diff --git a/.ci/clang-tidy.sh b/.ci/clang-tidy.sh
new file mode 100644
index 0000000..13b2ac7
--- /dev/null
+++ b/.ci/clang-tidy.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+echo "Doing clang-tidy..."
+bool=false
+# explicitly set IFS to contain only a line feed
+IFS='
+'
+filelist="$(find . -not \( -path './*build*' -prune \) -not \( -path './include' -prune \) -not \( -path './lib' -prune \) -type f ! -name "$(printf "*\n*")")"
+for file in $filelist; do
+  if echo "$file" | grep -q -E ".*(\.cpp|\.h|\.hpp)$" ; then
+    #Extra check missing dependencies due to clang-tidy doesn't toggle exit code.
+    clang_tidy_lib_check="$(clang-tidy -warnings-as-errors='*' -header-filter='.*,-cpptoml.hpp' "$file" -- -I. -std=c++14 2>&1)"
+    for tidy_line in $clang_tidy_lib_check; do
+      echo "$tidy_line" | grep -q -v -E "^Error while processing*"
+      if [ $? -eq 1 ]; then
+	bool=true
+      fi
+      echo "$tidy_line" | grep -q -v -E ".* error: .*"
+      if [ $? -eq 1 ]; then
+	bool=true
+      fi
+      echo "$tidy_line"
+    done
+  fi
+done
+if $bool; then
+  exit 1
+else
+  echo "No clang-tidy errors found."
+fi
+
+exit 0
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..6e8db98
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,2 @@
+Checks: '*,-llvm-header-guard,-fuchsia*,-cppcoreguidelines-pro-bounds-pointer-arithmetic,-cppcoreguidelines-pro-bounds-constant-array-index,-bugprone-narrowing-conversions,-cppcoreguidelines-narrowing-conversions,-cppcoreguidelines-pro-type-const-cast,-cppcoreguidelines-pro-type-reinterpret-cast,-hicpp-signed-bitwise,-bugprone-exception-escape,-cppcoreguidelines-pro-type-member-init,-cppcoreguidelines-pro-type-cstyle-cast,-hicpp-member-init,-google-readability-namespace-comments,-llvm-namespace-comment,-cppcoreguidelines-pro-type-vararg,-hicpp-vararg,-modernize-use-trailing-return-type,-readability-magic-numbers,-cppcoreguidelines-avoid-magic-numbers'
+WarningsAsErrors: 'true'
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..8ef29d7
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,77 @@
+---
+
+image: samueldebruyn/debian-git:latest
+
+stages:
+  - style
+  - test
+  - build
+
+
+clang_tidy:
+    image: joethei/clang_tidy
+    stage: style
+    tags:
+      - docker-ci
+    script:
+      - mkdir current
+      - ls -d .[!.]* | grep -v current | xargs mv -t current
+      - git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/library.git
+      - mkdir library/build
+      - cd library/build
+      - cmake ..
+      - make
+      - cd ../../current/.ci
+      - sh clang-tidy.sh
+
+
+make_test:
+  stage: test
+  tags:
+    - docker-ci
+  script:
+    - apt-get update
+    - apt-get install -y clang make cmake clang-tidy
+    - mkdir current
+    - ls | grep -v current | xargs mv -t current
+    - git clone https://github.com/catchorg/Catch2.git
+    - cd Catch2
+    - cmake -Bbuild -H. -DBUILD_TESTING=OFF
+    - cmake --build build/ --target install
+    - cd ..
+    - git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/library.git
+    - mkdir library/build
+    - cd library/build
+    - cmake ..
+    - make
+    - cd ../../current
+    - mkdir build
+    - cd build
+    - cmake ..
+    - make
+    - make test
+
+cmake_build:
+  stage: build
+  tags:
+    - docker-ci
+  script:
+    - apt-get update
+    - apt-get install -y clang make cmake clang-tidy
+    - mkdir current
+    - ls | grep -v current | xargs mv -t current
+    - git clone https://github.com/catchorg/Catch2.git
+    - cd Catch2
+    - cmake -Bbuild -H. -DBUILD_TESTING=OFF
+    - cmake --build build/ --target install
+    - cd ..
+    - git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/library.git
+    - mkdir library/build
+    - cd library/build
+    - cmake ..
+    - make
+    - cd ../../current
+    - mkdir build
+    - cd build
+    - cmake ..
+    - make
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d98dc7e..f3cfff7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,9 @@ if ("${CMAKE_BINARY_DIR}" STREQUAL "${CMAKE_SOURCE_DIR}")
 endif()
 set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "bin" "doc" "CMakeFiles" "lib" "include")
 
+set(CMAKE_C_COMPILER "clang")
+set(CMAKE_CXX_COMPILER "clang++")
+
 project(Simple_Draw)
 set(CMAKE_CXX_STANDARD 14)
 
@@ -16,7 +19,7 @@ set(CMAKE_CXX_CLANG_TIDY "clang-tidy;-checks=*")
 set(CMAKE_CXX_CLANG_TIDY clang-tidy;-header-filter=.;-checks=*;)
 
 file(GLOB_RECURSE SOURCES src/*.cpp)
-file(GLOB_RECURSE HEADERS src/*.h)
+file(GLOB_RECURSE HEADERS src/*.hpp)
 file(GLOB_RECURSE TESTS test/*.cpp)
 
 set(LIB_PATH "${CMAKE_SOURCE_DIR}/../library")
@@ -31,6 +34,7 @@ enable_testing()
 find_package(Catch2 REQUIRED)
 add_executable(UnitTests ${SOURCES} ${HEADERS} ${TESTS})
 target_link_libraries(UnitTests Catch2::Catch2)
+target_link_libraries(UnitTests ${LIB_PATH}/lib/liblibrary.a)
 
 include(CTest)
 include(Catch)
diff --git a/main/main.cpp b/main/main.cpp
index 53edc26..b2e1af8 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1,5 +1,114 @@
-#include "../src/demo.h"
+#include <iostream>
+#include "internal.hpp"
+#include "vkvm.hpp"
+#include "../src/DrawRender.hpp"
+#include <unistd.h>
+
+/**
+ * @author: Shaohua Tong
+ * @since: v0.0.1
+ * draw circle, square, rectangle and mouse drawing
+ */
 
 int main() {
-    return test();
+    vkvm::initialize(0);
+
+    vkvm::Color penColor(250,102,0);
+    int penWidth = 5;
+    DrawRender drawRender(vkvm::getWidth(), vkvm::getHeight(), vkvm::getBackgroundColor(), penColor, penWidth);
+
+    vkvm::registerEvent(vkvm::EventType::MouseMove, [&drawRender]() {
+        vkvm::Coordinates mousePosition = vkvm::getMousePosition();
+        mousePosition.y = mousePosition.y - 30;
+        drawRender.setMousePostion(mousePosition);
+
+        drawRender.graphicsUpdate(CURSOR);
+        vkvm::callEvent(vkvm::EventType::Redraw);
+
+        if(drawRender.getMouseDown()) {
+            if (drawRender.getTurnOnBrush()) {
+                drawRender.graphicsUpdate(BRUSH);
+                vkvm::callEvent(vkvm::EventType::Redraw);
+            }
+
+            if((drawRender.getKeyCode()) == vkvm::KeyCode::C) {
+                drawRender.graphicsUpdate(CIRCLE);
+                vkvm::callEvent(vkvm::EventType::Redraw);
+            }
+
+            else if((drawRender.getKeyCode()) == vkvm::KeyCode::R) {
+                drawRender.graphicsUpdate(RECTANGLE);
+                vkvm::callEvent(vkvm::EventType::Redraw);
+            }
+        }
+    });
+
+    vkvm::registerEvent(vkvm::EventType::MouseLeftDown, [&drawRender]() {
+        drawRender.setFinish(false);
+
+        if(!drawRender.getMouseDown()) {
+            drawRender.setMouseDown(true);
+
+            vkvm::Coordinates mousePosition = vkvm::getMousePosition();
+            mousePosition.y = mousePosition.y - 30;
+            drawRender.setMouseLeftDownPostion(mousePosition);
+        }
+
+        if((!drawRender.getTurnOnBrush()) && ((drawRender.getKeyCode() - 65536) == vkvm::KeyCode::B)) {
+            drawRender.setTurnOnBrush(true);
+        }
+    });
+
+    vkvm::registerEvent(vkvm::EventType::MouseLeftUp, [&drawRender]() {
+        drawRender.setFinish(true);
+
+        vkvm::Coordinates mousePosition = vkvm::getMousePosition();
+        mousePosition.y = mousePosition.y - 30;
+        drawRender.setMousePostion(mousePosition);
+
+        if(((drawRender.getKeyCode()) == vkvm::KeyCode::C) && drawRender.getPainting()) {
+            drawRender.graphicsUpdate(CIRCLE);
+            vkvm::callEvent(vkvm::EventType::Redraw);
+        }
+
+        else if(((drawRender.getKeyCode()) == vkvm::KeyCode::R) && drawRender.getPainting()) {
+            drawRender.graphicsUpdate(RECTANGLE);
+            vkvm::callEvent(vkvm::EventType::Redraw);
+        }
+
+        drawRender.setTurnOnBrush(false);
+        drawRender.setMouseDown(false);
+        drawRender.setPainting(false);
+
+
+    });
+
+    vkvm::registerEvent(vkvm::EventType::KeyDown, [&drawRender]() {
+        drawRender.setKeyCode(vkvm::getLastPressedKey());
+
+        if((drawRender.getKeyCode()) == vkvm::KeyCode::D) {
+            drawRender.clear();
+            vkvm::callEvent(vkvm::EventType::Redraw);
+        }
+
+        else if((drawRender.getKeyCode()) == vkvm::KeyCode::Q) {
+            drawRender.graphicsUpdate(SHAPE);
+            vkvm::callEvent(vkvm::EventType::Redraw);
+        }
+    });
+
+    vkvm::registerEvent(vkvm::EventType::KeyUp, [&drawRender]() {
+        drawRender.setKeyCode(vkvm::getLastPressedKey());
+
+        if((drawRender.getKeyCode()) == vkvm::KeyCode::D) {
+            drawRender.clear();
+            vkvm::callEvent(vkvm::EventType::Redraw);
+        }
+    });
+
+    while(1){
+        sleep(5);
+    }
+
+    return 0;
 }
\ No newline at end of file
diff --git a/src/Circle.cpp b/src/Circle.cpp
new file mode 100644
index 0000000..b3ba8c0
--- /dev/null
+++ b/src/Circle.cpp
@@ -0,0 +1,55 @@
+#include "Circle.hpp"
+
+Circle::Circle() {
+
+}
+
+Circle::Circle(vkvm::Coordinates center, int radius, int penWidth, bool brush) {
+    this -> center = center;
+    this -> radius = radius;
+
+    int x_draw = 0;
+    int y_draw = 0;
+    int distance = 0;
+
+    uperLeft.x = center.x - radius;
+    uperLeft.y = center.y - radius;
+    bottomRight.x = center.x + radius;
+    bottomRight.y = center.y + radius;
+
+    vkvm::Coordinates temp;
+    circle.resize(2 * radius);
+    for(y_draw = 0; y_draw < 2 * radius; y_draw++) {
+        circle[y_draw].resize(2 * radius);
+        for(x_draw = 0; x_draw < 2 * radius; x_draw++) {
+            temp.x = uperLeft.x + x_draw;
+            temp.y = uperLeft.y + y_draw;
+            distance = utils::squareOfDistance(temp, center);
+
+            if(!brush) {
+                if( distance <= (radius * radius) && distance >= ((radius - penWidth) * (radius - penWidth)))
+                    circle[y_draw][x_draw] = true;
+            }
+            else {
+                if( distance <= (radius * radius))
+                    circle[y_draw][x_draw] = true;
+            }
+        }
+    }
+}
+
+std::vector<std::vector<bool>> Circle::getCircle() {
+    return circle;
+}
+
+int Circle::getRadius() {
+    return radius;
+}
+
+vkvm::Coordinates Circle::getUperLeft() {
+    return uperLeft;
+}
+
+vkvm::Coordinates Circle::getBottomRight() {
+    return bottomRight;
+}
\ No newline at end of file
diff --git a/src/Circle.hpp b/src/Circle.hpp
new file mode 100644
index 0000000..9177747
--- /dev/null
+++ b/src/Circle.hpp
@@ -0,0 +1,30 @@
+#ifndef SIMPLE_DRAW_CIRCLE_HPP
+#define SIMPLE_DRAW_CIRCLE_HPP
+
+#include "internal.hpp"
+#include "vkvm.hpp"
+#include "utils.hpp"
+
+class Circle {
+public:
+    Circle();
+
+    Circle(vkvm::Coordinates center, int radius, int penWidth, bool brush);
+    std::vector<std::vector<bool>> getCircle();
+    int getRadius();
+    vkvm::Coordinates getUperLeft();
+    vkvm::Coordinates getBottomRight();
+
+private:
+    vkvm::Coordinates center;
+    int radius;
+    vkvm::Coordinates uperLeft;
+    vkvm::Coordinates bottomRight;
+
+    std::vector<std::vector<bool>> circle;
+
+    std::vector<std::vector<bool>> circleCreator(int penWidth, bool brush);
+};
+
+
+#endif //SIMPLE_DRAW_CIRCLE_H
diff --git a/src/Cursor.cpp b/src/Cursor.cpp
new file mode 100644
index 0000000..7b2a6da
--- /dev/null
+++ b/src/Cursor.cpp
@@ -0,0 +1,47 @@
+//
+// Created by shaohuatong on 08.12.19.
+//
+
+#include "Cursor.hpp"
+
+Cursor::Cursor() {
+
+}
+
+Cursor::Cursor(vkvm::Coordinates mousePosition, int penWidth, int radius) {
+    this->mousePosition = mousePosition;
+    this->radius = radius;
+
+    int x_draw = 0;
+    int y_draw = 0;
+
+    uperLeft.x = mousePosition.x - radius;
+    uperLeft.y = mousePosition.y - radius;
+    bottomRight.x = mousePosition.x + radius;
+    bottomRight.y = mousePosition.y + radius;
+
+    vkvm::Coordinates temp;
+    cursor.resize(2 * radius);
+    for(y_draw = 0; y_draw < 2 * radius; y_draw++) {
+        cursor[y_draw].resize(2 * radius);
+        for(x_draw = 0; x_draw < 2 * radius; x_draw++) {
+            if((x_draw >= radius - penWidth && x_draw <= radius + penWidth)
+            || (y_draw >= radius - penWidth && y_draw <= radius + penWidth)) {
+                cursor[y_draw][x_draw] = true;
+            }
+
+        }
+    }
+}
+
+std::vector<std::vector<bool>> Cursor::getCursor() {
+    return cursor;
+}
+
+vkvm::Coordinates Cursor::getUperLeft() {
+    return uperLeft;
+}
+
+vkvm::Coordinates Cursor::getBottomRight() {
+    return bottomRight;
+}
\ No newline at end of file
diff --git a/src/Cursor.hpp b/src/Cursor.hpp
new file mode 100644
index 0000000..0e0bf43
--- /dev/null
+++ b/src/Cursor.hpp
@@ -0,0 +1,31 @@
+//
+// Created by shaohuatong on 08.12.19.
+//
+
+#ifndef SIMPLE_DRAW_CURSOR_HPP
+#define SIMPLE_DRAW_CURSOR_HPP
+
+#include "vkvm.hpp"
+#include "internal.hpp"
+#include "utils.hpp"
+
+class Cursor {
+public:
+    Cursor();
+
+    Cursor(vkvm::Coordinates mousePosition, int penWidth, int radius);
+    std::vector<std::vector<bool>> getCursor();
+    vkvm::Coordinates getUperLeft();
+    vkvm::Coordinates getBottomRight();
+
+private:
+    int radius;
+    vkvm::Coordinates uperLeft;
+    vkvm::Coordinates bottomRight;
+    vkvm::Coordinates mousePosition;
+    std::vector<std::vector<bool>> cursor;
+
+};
+
+
+#endif //SIMPLE_DRAW_CURSOR_HPP
diff --git a/src/DrawRender.cpp b/src/DrawRender.cpp
new file mode 100644
index 0000000..1d71731
--- /dev/null
+++ b/src/DrawRender.cpp
@@ -0,0 +1,222 @@
+#include "DrawRender.hpp"
+#include "vkvm.hpp"
+#include <algorithm>
+#include <thread>
+#include <chrono>
+
+DrawRender::DrawRender(int windowWidth, int windowHeight, vkvm::Color defaultBackgroundColor, vkvm::Color penColor, int penWidth)
+        : backgroundColor(defaultBackgroundColor), penColor(penColor) {
+    this-> windowWidth = windowWidth;
+    this-> windowHeight = windowHeight;
+    this-> penWidth = penWidth;
+}
+
+void DrawRender::graphicsUpdate(int type) {
+    std::vector<std::vector<bool>> shape;
+
+    if (type == CIRCLE) {
+        if(painting)
+            clearToSharedMemory(oldCircle.getCircle(),
+                                oldCircle.getUperLeft().x, oldCircle.getUperLeft().y);
+
+        int radius = utils::getDistance(getMouseLeftDownPosition(), getMousePostion()) / 2;
+
+        vkvm::Coordinates center;
+        center.x = (mousePosition.x + mouseLeftDownPosition.x) / 2;
+        center.y = (mousePosition.y + mouseLeftDownPosition.y) / 2;
+
+        if(center.x + radius > windowWidth || center.x - radius < 0
+                || center.y + radius > windowHeight || center.y - radius < 0) {
+            radius = std::min(std::min(center.x, windowWidth - center.x), std::min(center.y, windowHeight - center.y));
+        }
+
+        oldCircle = Circle(center, radius, penWidth, false);
+
+        painting = true;
+
+        translateToSharedMemory(oldCircle.getCircle(), oldCircle.getUperLeft().x, oldCircle.getUperLeft().y, false);
+
+        if(finish)
+            shapes.addShape(oldCircle.getCircle(), oldCircle.getUperLeft().x, oldCircle.getUperLeft().y,
+                    oldCircle.getBottomRight().x, oldCircle.getBottomRight().y);
+    }
+
+    else if (type == RECTANGLE) {
+        if(painting)
+            clearToSharedMemory(oldRectangle.getRectangle(),
+                                oldRectangle.getUperLeft().x, oldRectangle.getUperLeft().y);
+
+        oldRectangle = Rectangle(mouseLeftDownPosition, mousePosition, penWidth);
+
+        painting = true;
+
+        translateToSharedMemory(oldRectangle.getRectangle(),
+                oldRectangle.getUperLeft().x, oldRectangle.getUperLeft().y, false);
+
+        if(finish)
+            shapes.addShape(oldRectangle.getRectangle(), oldRectangle.getUperLeft().x, oldRectangle.getUperLeft().y,
+                            oldRectangle.getBottomRight().x, oldRectangle.getBottomRight().y);
+    }
+
+    else if (type == BRUSH) {
+        int radius = penWidth;
+        vkvm::Coordinates center = mousePosition;
+
+        oldCircle =  Circle(center, radius, penWidth, true);
+
+        translateToSharedMemory(oldCircle.getCircle(), oldCircle.getUperLeft().x, oldCircle.getUperLeft().y, false);
+
+        if(finish)
+            shapes.addShape(oldCircle.getCircle(), oldCircle.getUperLeft().x, oldCircle.getUperLeft().y,
+                            oldCircle.getBottomRight().x, oldCircle.getBottomRight().y);
+    }
+
+    else if (type == CURSOR) {
+        if(cursorStart != 0)
+            clearToSharedMemory(oldCursor.getCursor(),
+                    oldCursor.getUperLeft().x, oldCursor.getUperLeft().y);
+
+        int radius = 10;
+
+        oldCursor = Cursor(mousePosition, 1, radius);
+
+        cursorStart = 1;
+
+        translateToSharedMemory(oldCursor.getCursor(), oldCursor.getUperLeft().x, oldCursor.getUperLeft().y, true);
+    }
+    else if (type == SHAPE) {
+        for(int i = 0; i < shapes.getCount(); i++) {
+            penColor = vkvm::Color(rand() % 255,rand() % 255,rand() % 255);
+            translateToSharedMemory(shapes.getShape(i), shapes.getStartX(i), shapes.getStartY(i), false);
+        }
+
+    }
+}
+
+void DrawRender::clear() {
+    int x, y;
+    for(y = 0; y < windowHeight; y++) {
+        for(x = 0; x < windowWidth; x++) {
+            vkvm::setPixel(x, y, backgroundColor);
+        }
+    }
+
+    shapes = Shapes();
+}
+
+void DrawRender::cursorCreator() {
+
+}
+
+void DrawRender::translateToSharedMemory(std::vector<std::vector<bool>> shape, int startX, int startY, bool isCursor) {
+    int x, y;
+    int currentX = startX;
+    int currentY = startY;
+
+    for(y = 0; y < shape.size(); y++) {
+        for(x = 0; x < shape[y].size(); x++) {
+            if(shape[y][x]) {
+                if(isCursor)
+                    vkvm::setPixel(currentX, currentY, vkvm::Color(0,238,0));
+                else if(turnOnBrush || finish)
+                    vkvm::setPixel(currentX, currentY, penColor);
+                else
+                    vkvm::setPixel(currentX, currentY, vkvm::Color(217,217,217));
+            }
+            currentX++;
+        }
+        currentX = startX;
+        currentY++;
+    }
+
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+}
+
+void DrawRender::clearToSharedMemory(std::vector<std::vector<bool>> shape, int startX, int startY) {
+    int x, y;
+    int currentX = startX;
+    int currentY = startY;
+
+    for(y = 0; y < shape.size(); y++) {
+        for(x = 0; x < shape[y].size(); x++) {
+            if((shape[y][x])) {
+                if(!shapes.containsPixel(x + startX, y + startY)) {
+                    vkvm::setPixel(currentX, currentY, backgroundColor);
+                }
+                else {
+                    vkvm::setPixel(currentX, currentY, penColor);
+                }
+            }
+            currentX++;
+        }
+        currentX = startX;
+        currentY++;
+    }
+}
+
+vkvm::Coordinates DrawRender::getMouseLeftDownPosition() {
+    return mouseLeftDownPosition;
+}
+
+void DrawRender::setMouseLeftDownPostion(vkvm::Coordinates newMousePosition)  {
+    mouseLeftDownPosition = newMousePosition;
+}
+
+vkvm::Coordinates DrawRender::getMousePostion() {
+    return mousePosition;
+}
+
+void DrawRender::setMousePostion(vkvm::Coordinates newMousePosition) {
+    if(newMousePosition.x >= 0 && newMousePosition.x <= windowWidth && newMousePosition.y >= 30 && newMousePosition.y <= windowHeight) {
+
+    }
+    else {
+        newMousePosition.x = newMousePosition.x < 0 ? 0: newMousePosition.x;
+        newMousePosition.y = newMousePosition.y < 30 ? 0 : newMousePosition.y;
+        newMousePosition.x = newMousePosition.x > windowWidth ? windowWidth : newMousePosition.x;
+        newMousePosition.y =  newMousePosition.y > windowHeight ? windowHeight :  newMousePosition.y;
+    }
+
+    mousePosition = newMousePosition;
+}
+
+void DrawRender::setKeyCode(vkvm::KeyCode newKeyCode) {
+    keyCode = newKeyCode;
+}
+
+vkvm::KeyCode DrawRender::getKeyCode() {
+    return keyCode;
+}
+
+void DrawRender::setTurnOnBrush(bool newTurnOnBrush) {
+    turnOnBrush = newTurnOnBrush;
+}
+
+bool DrawRender::getTurnOnBrush() {
+    return turnOnBrush;
+}
+
+
+bool DrawRender::getMouseDown() {
+    return mouseDown;
+}
+
+void DrawRender::setMouseDown(bool isMouseDown) {
+    mouseDown = isMouseDown;
+}
+
+bool DrawRender::getPainting() {
+    return painting;
+}
+
+void DrawRender::setPainting(bool isPainting) {
+    painting = isPainting;
+}
+
+void DrawRender::setFinish(bool isFinish) {
+    finish = isFinish;
+}
+
+bool DrawRender::getFinish() {
+    return finish;
+}
\ No newline at end of file
diff --git a/src/DrawRender.hpp b/src/DrawRender.hpp
new file mode 100644
index 0000000..083bf24
--- /dev/null
+++ b/src/DrawRender.hpp
@@ -0,0 +1,85 @@
+//
+// Created by shaohuatong on 21.11.19.
+//
+#ifndef SIMPLE_DRAW_DRAWRENDER_HPP
+#define SIMPLE_DRAW_DRAWRENDER_HPP
+
+#include "Cursor.hpp"
+#include "Rectangle.hpp"
+#include "Circle.hpp"
+#include "Shapes.hpp"
+#include "utils.hpp"
+#include "vkvm.hpp"
+#include <cmath>
+#include <string>
+#include <iostream>
+#include <vector>
+
+#define CIRCLE 0
+#define RECTANGLE 1
+#define BRUSH  2
+#define CURSOR  3
+#define SHAPE  4
+
+class DrawRender {
+public:
+    DrawRender(int windowWidth, int windowHeight, vkvm::Color defaultBackgroundColor, vkvm::Color penColor, int penWidth);
+    void graphicsUpdate(int type);
+
+    void setMouseLeftDownPostion(vkvm::Coordinates newMousePosition);
+    vkvm::Coordinates getMouseLeftDownPosition();
+    void setMousePostion(vkvm::Coordinates newMousePosition);
+    vkvm::Coordinates getMousePostion();
+
+    void setKeyCode(vkvm::KeyCode newKeyCode);
+    vkvm::KeyCode getKeyCode();
+
+    void setTurnOnBrush(bool turnOnBrush);
+    bool getTurnOnBrush();
+
+    void setMouseDown(bool isMouseDown);
+    bool getMouseDown();
+
+    void setPainting(bool isOneFinish);
+    bool getPainting();
+
+    void setFinish(bool isFinish);
+    bool getFinish();
+
+    void clear();
+
+private:
+    Shapes shapes;
+    Circle oldCircle = Circle();
+    Rectangle oldRectangle = Rectangle();
+    Cursor oldCursor = Cursor();
+    vkvm::Coordinates mouseLeftDownPosition;
+    vkvm::Coordinates mousePosition;
+    vkvm::Color backgroundColor;
+    vkvm::Color penColor;
+    vkvm::KeyCode keyCode;
+
+    int penWidth;
+    int windowWidth;
+    int windowHeight;
+    int cursorStart;
+    bool painting = true;
+    bool finish = false;
+    bool mouseDown = false;
+    bool turnOnBrush = false;
+
+    void cursorCreator();
+    void translateToSharedMemory(std::vector<std::vector<bool>> graphic, int startX, int startY, bool isCursor);
+    void clearToSharedMemory(std::vector<std::vector<bool>> graphic, int startX, int startY);
+};
+
+#endif //SIMPLE_DRAW_DRAWRENDER_HPP
+
+
+
+
+
+
+
+
+
diff --git a/src/Rectangle.cpp b/src/Rectangle.cpp
new file mode 100644
index 0000000..b136560
--- /dev/null
+++ b/src/Rectangle.cpp
@@ -0,0 +1,57 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#include "Rectangle.hpp"
+
+Rectangle::Rectangle() {
+
+}
+
+Rectangle::Rectangle(vkvm::Coordinates mouseLeftDownPostion, vkvm::Coordinates mousePostion, int penWidth) {
+    this -> mouseLeftDownPosition = mouseLeftDownPostion;
+    this -> mousePosition = mousePostion;
+
+    int x_draw = 0;
+    int y_draw = 0;
+
+    length = abs(mouseLeftDownPosition.x - mousePosition.x);
+    width = abs(mouseLeftDownPosition.y - mousePosition.y);
+    uperLeft.x = std::min(mouseLeftDownPosition.x, mousePosition.x);
+    uperLeft.y = std::min(mouseLeftDownPosition.y, mousePosition.y);
+    bottomRight.x = std::max(mouseLeftDownPosition.x, mousePosition.x);
+    bottomRight.y = std::max(mouseLeftDownPosition.y, mousePosition.y);
+
+    rectangle.resize(width);
+    for(y_draw = 0; y_draw < width; y_draw++) {
+        rectangle[y_draw].resize(length);
+        for(x_draw = 0; x_draw < length; x_draw++) {
+            if((x_draw >= 0 && x_draw <= penWidth) || (y_draw >= 0 && y_draw <= penWidth)
+               || (x_draw <= length && x_draw >= length - penWidth)
+               || (y_draw <= width && y_draw >= width - penWidth)) {
+                rectangle[y_draw][x_draw] = true;
+            }
+        }
+    }
+}
+
+
+std::vector<std::vector<bool>> Rectangle::getRectangle() {
+    return rectangle;
+}
+
+int Rectangle::getWidth() {
+    return width;
+}
+
+int Rectangle::getLength() {
+    return length;
+}
+
+vkvm::Coordinates Rectangle::getUperLeft() {
+    return uperLeft;
+}
+
+vkvm::Coordinates Rectangle::getBottomRight() {
+    return bottomRight;
+}
\ No newline at end of file
diff --git a/src/Rectangle.hpp b/src/Rectangle.hpp
new file mode 100644
index 0000000..da2550c
--- /dev/null
+++ b/src/Rectangle.hpp
@@ -0,0 +1,34 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#ifndef SIMPLE_DRAW_RECTANGLE_HPP
+#define SIMPLE_DRAW_RECTANGLE_HPP
+
+#include "internal.hpp"
+#include "vkvm.hpp"
+#include "utils.hpp"
+
+class Rectangle {
+public:
+    Rectangle();
+
+    Rectangle(vkvm::Coordinates mouseLeftDownPosition, vkvm::Coordinates mousePosition, int penWidth);
+    std::vector<std::vector<bool>> getRectangle();
+    int getLength();
+    int getWidth();
+    vkvm::Coordinates getUperLeft();
+    vkvm::Coordinates getBottomRight();
+
+private:
+    int length;
+    int width;
+    vkvm::Coordinates uperLeft;
+    vkvm::Coordinates bottomRight;
+    vkvm::Coordinates mouseLeftDownPosition;
+    vkvm::Coordinates mousePosition;
+    std::vector<std::vector<bool>> rectangle;
+
+};
+
+#endif //SIMPLE_DRAW_RECTANGLE_HPP
diff --git a/src/Shapes.cpp b/src/Shapes.cpp
new file mode 100644
index 0000000..816bf67
--- /dev/null
+++ b/src/Shapes.cpp
@@ -0,0 +1,58 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#include <iostream>
+#include "Shapes.hpp"
+
+void Shapes::addShape(std::vector<std::vector<bool>> shape, int startX, int startY, int endX, int endY) {
+    count++;
+
+    shapes.resize(count);
+    startXs.resize(count);
+    startYs.resize(count);
+    endXs.resize(count);
+    endYs.resize(count);
+
+    startXs[count-1] = startX;
+    startYs[count-1] = startY;
+    endXs[count-1] = endX;
+    endYs[count-1] = endY;
+
+//    shapes[count-1].resize(shape.size());
+//    for(int y = 0; y < shape.size(); y++) {
+//        shapes[count-1][y].resize(shape[y].size());
+//        for(int x = 0; x < shape[y].size(); x++) {
+//            shapes[count-1][y][x] = shape[y][x];
+//        }
+//    }
+    shapes[count-1] = shape;
+}
+
+bool Shapes::containsPixel(int x, int y) {
+    for(int i = 0; i < count; i++) {
+        if(x >= startXs[i] && x < endXs[i] && y >= startYs[i] && y < endYs[i]) {
+            if(shapes[i][y-startYs[i]][x-startXs[i]]) {
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+int Shapes::getCount() {
+    return count;
+}
+
+std::vector<std::vector<bool>> Shapes::getShape(int index) {
+    return shapes[index];
+}
+
+int Shapes::getStartX(int index) {
+    return startXs[index];
+}
+
+int Shapes::getStartY(int index) {
+    return startYs[index];
+}
\ No newline at end of file
diff --git a/src/Shapes.hpp b/src/Shapes.hpp
new file mode 100644
index 0000000..2317d2d
--- /dev/null
+++ b/src/Shapes.hpp
@@ -0,0 +1,31 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#ifndef SIMPLE_DRAW_SHAPES_HPP
+#define SIMPLE_DRAW_SHAPES_HPP
+
+#include "vkvm.hpp"
+#include "internal.hpp"
+
+class Shapes {
+public:
+    void addShape(std::vector<std::vector<bool>> shape, int startX,
+            int startY, int endX, int endY);
+    bool containsPixel(int x, int y);
+    int getCount();
+    std::vector<std::vector<bool>> getShape(int index);
+    int getStartX(int index);
+    int getStartY(int index);
+
+private:
+    int count = 0;
+    std::vector<int> startXs;
+    std::vector<int> startYs;
+    std::vector<int> endXs;
+    std::vector<int> endYs;
+    std::vector<std::vector<std::vector<bool>>> shapes;
+};
+
+
+#endif //SIMPLE_DRAW_SHAPES_HPP
diff --git a/src/utils.cpp b/src/utils.cpp
new file mode 100644
index 0000000..0c63ccb
--- /dev/null
+++ b/src/utils.cpp
@@ -0,0 +1,9 @@
+#include "utils.hpp"
+
+int utils::squareOfDistance(vkvm::Coordinates x, vkvm::Coordinates y) {
+    return (x.x - y.x) * (x.x - y.x) + (x.y - y.y) * (x.y - y.y);
+}
+
+int utils::getDistance(vkvm::Coordinates x, vkvm::Coordinates y) {
+    return (int)floor(sqrt(squareOfDistance(x, y)));
+}
\ No newline at end of file
diff --git a/src/utils.hpp b/src/utils.hpp
new file mode 100644
index 0000000..fd9c082
--- /dev/null
+++ b/src/utils.hpp
@@ -0,0 +1,18 @@
+//
+// Created by shaohuatong on 06.12.19.
+//
+
+#ifndef SIMPLE_DRAW_UTILS_HPP
+#define SIMPLE_DRAW_UTILS_HPP
+
+#include "vkvm.hpp"
+#include <cmath>
+
+class utils {
+public:
+    static int squareOfDistance(vkvm::Coordinates x, vkvm::Coordinates y);
+    static int getDistance(vkvm::Coordinates x, vkvm::Coordinates y);
+};
+
+
+#endif //SIMPLE_DRAW_UTILS_H