diff --git a/.ci/clang-tidy.sh b/.ci/clang-tidy.sh
new file mode 100755
index 0000000..71994b5
--- /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 \( -path './include' -prune \)  -type f ! -name "$(printf "*\n*")")"
+for file in $filelist; do
+  if echo "$file" | grep -q -E ".*(\.cpp|\.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 $bool; then
+  exit 1
+else
+  echo "No clang-tidy errors found."
+fi
+
+exit 0
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..6e8db98
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,2 @@
+Checks: '*,-llvm-header-guard,-fuchsia*,-cppcoreguidelines-pro-bounds-pointer-arithmetic,-cppcoreguidelines-pro-bounds-constant-array-index,-bugprone-narrowing-conversions,-cppcoreguidelines-narrowing-conversions,-cppcoreguidelines-pro-type-const-cast,-cppcoreguidelines-pro-type-reinterpret-cast,-hicpp-signed-bitwise,-bugprone-exception-escape,-cppcoreguidelines-pro-type-member-init,-cppcoreguidelines-pro-type-cstyle-cast,-hicpp-member-init,-google-readability-namespace-comments,-llvm-namespace-comment,-cppcoreguidelines-pro-type-vararg,-hicpp-vararg,-modernize-use-trailing-return-type,-readability-magic-numbers,-cppcoreguidelines-avoid-magic-numbers'
+WarningsAsErrors: 'true'
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..f5f6d89
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,76 @@
+---
+
+image: samueldebruyn/debian-git:latest
+
+stages:
+  - style
+  - test
+  - build
+
+
+clang_tidy:
+    image: joethei/clang_tidy
+    stage: style
+    tags:
+      - docker-ci
+    script:
+      - mkdir current
+      - ls -d .[!.]* | grep -v current | xargs mv -t current
+      - git clone https://gitlab-ci-token:${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 g++ 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:${CI_JOB_TOKEN}@gitlab.repo.digitech.hs-emden-leer.de/link/projekte/ws19/vkvm-new/library.git
+    - mkdir library/build
+    - cd library/build
+    - cmake ..
+    - make
+    - cd ../../current
+    - mkdir build
+    - cd build
+    - cmake ..
+    - make
+    - make test
+
+cmake_build:
+  stage: build
+  tags:
+    - docker-ci
+  script:
+    - apt-get update
+    - apt-get install -y g++ make cmake clang-tidy
+    - mkdir current
+    - ls | grep -v current | xargs mv -t current
+    - git clone https://github.com/catchorg/Catch2.git
+    - cd Catch2
+    - cmake -Bbuild -H. -DBUILD_TESTING=OFF
+    - cmake --build build/ --target install
+    - cd ..
+    - git clone https://gitlab-ci-token:${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
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0a166fc..c5c769d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,11 +12,11 @@ project(TextRenderer)
 set(CMAKE_CXX_STANDARD 14)
 
 # enable clang_tidy
-set(CMAKE_CXX_CLANG_TIDY "clang-tidy;-checks=*")
-set(CMAKE_CXX_CLANG_TIDY clang-tidy;-header-filter=.;-checks=*;)
+set(CMAKE_CXX_CLANG_TIDY "clang-tidy")
+set(CMAKE_CXX_CLANG_TIDY clang-tidy;-header-filter=.;)
 
 file(GLOB_RECURSE SOURCES src/*.cpp)
-file(GLOB_RECURSE HEADERS src/*.h)
+file(GLOB_RECURSE HEADERS src/*.hpp)
 file(GLOB_RECURSE TESTS test/*.cpp)
 include_directories(src)
 include_directories(test)
@@ -30,12 +30,14 @@ include_directories(${LIB_PATH}/include)
 add_executable(TextRenderer ${SOURCES} ${HEADERS} main/main.cpp)
 
 target_link_libraries(TextRenderer ${LIB_PATH}/lib/liblibrary.a)
-
+target_link_libraries(TextRenderer pthread)
 
 enable_testing()
 find_package(Catch2 REQUIRED)
 add_executable(UnitTests ${SOURCES} ${HEADERS} ${TESTS})
+target_link_libraries(UnitTests ${LIB_PATH}/lib/liblibrary.a)
 target_link_libraries(UnitTests Catch2::Catch2)
+target_link_libraries(UnitTests pthread)
 
 include(CTest)
 include(Catch)
diff --git a/README.md b/README.md
index cdadfe7..39b4cf8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,10 @@
-# vKVM TextRenderer
+# vKVM Text Renderer
+
+The Text Renderer gets the string from the text area in the Shared Memory and writes it
+into pixelarea.
+
+To convert a string the Text Renderer uses a font, which is loaded from a bitmap-file.
+
 
 ## Installation
 
@@ -6,36 +12,3 @@ Use the installation script provided in the Scripts repository
 to install the full package.
 
 Installing a single component is currently not supported.
-
-## Target
-
-TextRender build exports an interface target TextRender::TextRender. 
-
-This means that if TextRender has been installed on the Project Path, it 
-should be enough to do.
-
-translate a string from terminal to the readable form of shared memory . 
-
-## Usage
-
-    mkdir build
-    cd build
-    cmake ..
-    make
-
-## Description
-
-TextRender has two class, Bitmap class and Font class. 
-
-res/font.bmp (bitmap data, used by Bitmap::load() function)
-
-res/font.toml (configuration file, it configure how to read the font.bmp)
-
-src/Bitmap class, it used to read the font.bmp file.
-
-src/Font class, it read the font.bmp data by Bitmap class, 
-translate a string to a bitmap.
-
-test folder used to test.
-
-main folder is only used to test now.
\ No newline at end of file
diff --git a/main/main.cpp b/main/main.cpp
index e7b311b..cc5f9d6 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1,36 +1,117 @@
-#include "add.h"
-#include "Bitmap.h"
-#include "Font.h"
-
+#include "Font.hpp"
+#include "internal.hpp"
+#include "vkvm.hpp"
+#include <thread>
 #include <iostream>
 
+int cursorPosX = 0;
+int cursorPosY = 0;
+bool showCursor = false;
+
 /**
  * @author: Julian Hinxlage
  * @since: v0.0.0
  * @brief: An image is loaded and used as a font.
- * A string is converted and displayed in the console.
- * Currently only to test.
  */
-int main() {
-    Font font("../res/font2.bmp","../res/font2.toml");
 
-    std::string str;
-    std::cout << "string to draw: ";
-    std::getline(std::cin, str);
+void threadHandler(Font &font){
+    static bool cursorState{false};
 
-    for (int i = 0; i < font.height(); i++) {
-        for (char c : str) {
-            for (int j = 0; j < font.width(); j++) {
-                if (font.getPixel(c,j,i)) {
-                    std::cout << "█";
+    int start = 0;
+    int end = font.height();
+    auto bc = vkvm::getBackgroundColor();
+    auto fc = vkvm::getForegroundColor();
+
+    while(true){
+        if(showCursor) {
+            int x = cursorPosX - 1;
+            if (x < 0) {
+                x = 0;
+            }
+
+            for (int i = start; i < end; i++) {
+                if (cursorState) {
+                    vkvm::setPixel(x, cursorPosY + i, bc);
                 } else {
-                    std::cout << " ";
+                    vkvm::setPixel(x, cursorPosY + i, fc);
                 }
             }
-            std::cout << " ";
+            vkvm::callEvent(vkvm::EventType::Redraw);
+            cursorState = !cursorState;
         }
-        std::cout << std::endl;
+        std::this_thread::sleep_for(std::chrono::milliseconds(800));
     }
-
-    return 0;
 }
+
+int main() {
+    vkvm::initialize(0);
+    vkvm::setLogLevel(vkvm::DEBUG);
+
+    Font font(
+            std::string() + "../res/font" +
+            std::to_string(static_cast<int>(vkvm::getFont())) + ".bmp",
+            std::string() + "../res/font" +
+            std::to_string(static_cast<int>(vkvm::getFont())) + ".toml");
+
+    std::thread thread(std::bind(threadHandler, font));
+
+    vkvm::registerEvent(vkvm::EventType::RenderText, [&font]() {
+        std::string currentText = vkvm::getText();
+        int perRow = vkvm::getWidth() / font.width();
+        auto bc = vkvm::getBackgroundColor();
+        auto fc = vkvm::getForegroundColor();
+
+        //clear area
+        for(int y = 0; y < vkvm::getHeight();y++){
+            for(int x = 0; x < vkvm::getWidth();x++) {
+                vkvm::setPixel(x,y,bc);
+            }
+        }
+
+        showCursor = false;
+        int x = 0;
+        int y = 0;
+        for(char c : currentText){
+            if(c == '\n'){
+                y++;
+                x = 0;
+            }else if(c == -127){
+                cursorPosX = x * font.width();
+                cursorPosY = y * font.height();
+                showCursor = true;
+            }
+            else{
+                if(x == perRow){
+                    y++;
+                    x = 0;
+                }
+
+                for(int i = 0; i < font.height();i++){
+                    for(int j = 0; j < font.width();j++){
+                        if(font.getPixel(c, j, i)){
+                            vkvm::setPixel(x * font.width() + j, y * font.height() + i, fc);
+                        }else{
+                            vkvm::setPixel(x * font.width() + j, y * font.height() + i, bc);
+                        }
+                    }
+                }
+                x++;
+            }
+        }
+
+        vkvm::callEvent(vkvm::EventType::Redraw);
+    });
+
+    vkvm::registerEvent(vkvm::EventType::UpdateControlRegisters, [&font]() {
+        font.load(
+                std::string() + "../res/font" +
+                std::to_string(static_cast<int>(vkvm::getFont())) + ".bmp",
+                std::string() + "../res/font" +
+                std::to_string(static_cast<int>(vkvm::getFont())) + ".toml");
+    });
+
+    while (true) {
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/res/font3.bmp b/res/font3.bmp
new file mode 100644
index 0000000..c7eb8ec
Binary files /dev/null and b/res/font3.bmp differ
diff --git a/res/font3.toml b/res/font3.toml
new file mode 100644
index 0000000..102a09f
--- /dev/null
+++ b/res/font3.toml
@@ -0,0 +1,12 @@
+xOffset = 6
+yOffset = 6
+xSize = 18
+ySize = 27
+xCount = 32
+yCount = 9
+xStart = 7
+yStart = 9
+fillValue = 4294967295
+firstChar = 25
+pixelSize = 1
+invertedColors = 1
diff --git a/res/font4.bmp b/res/font4.bmp
new file mode 100644
index 0000000..8b34cda
Binary files /dev/null and b/res/font4.bmp differ
diff --git a/res/font4.toml b/res/font4.toml
new file mode 100644
index 0000000..fb1adf0
--- /dev/null
+++ b/res/font4.toml
@@ -0,0 +1,12 @@
+xOffset = 6
+yOffset = 2
+xSize = 10
+ySize = 14
+xCount = 255
+yCount = 255
+xStart = 33
+yStart = 65
+fillValue = 0
+firstChar = 0
+pixelSize = 1
+invertedColors = 0
diff --git a/src/Bitmap.cpp b/src/Bitmap.cpp
index a264e50..252a969 100644
--- a/src/Bitmap.cpp
+++ b/src/Bitmap.cpp
@@ -1,4 +1,4 @@
-#include "Bitmap.h"
+#include "Bitmap.hpp"
 #include <fstream>
 #include <iostream>
 
@@ -26,11 +26,10 @@ void Bitmap::load(const std::string &file) {
         for(int i = 0; i < str.size();i++){
             data[i] = str[i];
         }
-
-        offset = (int)*(unsigned int*)(&data[10]);
-        width = (int)*(unsigned int*)(&data[18]);
-        height = (int)*(unsigned int*)(&data[22]);
-        bpp = (int)*(unsigned short*)(&data[28]);
+        offset = *reinterpret_cast<int*>(&data[10]);
+        width = *reinterpret_cast<int*>(&data[18]);
+        height = *reinterpret_cast<int*>(&data[22]);
+        bpp = *reinterpret_cast<uint16_t *>(&data[28]);
     }
 }
 
@@ -52,12 +51,18 @@ int Bitmap::getBitsPerPixel() {
 
 unsigned int Bitmap::getPixel(int x, int y) {
     unsigned int pixel = 0;
+
+    if(bpp == 1){
+        int index = (getHeight() - 1 - y) * getWidth() + x;
+        char *ptr = getData() + (index / 8);
+        bool value = (ptr[0] >> (7 - (index % 8))) & 1u;
+        return (int)value;
+    }
+
     char *ptr = getData() + ((getHeight() - 1 - y) * getWidth() + x) * (getBitsPerPixel() / 8);
     for(int i = 0; i < getBitsPerPixel() / 8;i++){
-        *((char*)&pixel+i) = ptr[i];
-    }
-    if(pixel != 0){
-        return pixel;
+        auto value = reinterpret_cast<char*>(&pixel)+i;
+        *value = ptr[i];
     }
     return pixel;
 }
diff --git a/src/Bitmap.h b/src/Bitmap.hpp
similarity index 89%
rename from src/Bitmap.h
rename to src/Bitmap.hpp
index 7c82032..6314810 100644
--- a/src/Bitmap.h
+++ b/src/Bitmap.hpp
@@ -1,5 +1,5 @@
-#ifndef TEXTRENDERER_BITMAP_H
-#define TEXTRENDERER_BITMAP_H
+#ifndef TEXTRENDERER_BITMAP_HPP
+#define TEXTRENDERER_BITMAP_HPP
 
 #include <string>
 #include <vector>
@@ -19,7 +19,7 @@ public:
      * @since: v0.0.0
      * @brief: Used to load a Bitmap from a file.
      */
-     void load(const std::string &file);
+    void load(const std::string &file);
 
     /**
      * @author: Julian Hinxlage
@@ -65,4 +65,4 @@ private:
 };
 
 
-#endif //TEXTRENDERER_BITMAP_H
+#endif //TEXTRENDERER_BITMAP_HPP
diff --git a/src/Font.cpp b/src/Font.cpp
index f0d6318..8bcb062 100644
--- a/src/Font.cpp
+++ b/src/Font.cpp
@@ -2,8 +2,8 @@
 // Copyright (c) 2019 Julian Hinxlage. All rights reserved.
 //
 
-#include "Font.h"
-#include <cpptoml.h>
+#include "Font.hpp"
+#include "../lib/toml/cpptoml.h"
 
 Font::Font() {
     xOffset = 0;
@@ -16,6 +16,9 @@ Font::Font() {
     yStart = 0;
     fillValue = 0;
     firstChar = ' ';
+    pixelSize = 1;
+    gap = -1;
+    invertedColors = false;
 }
 
 Font::Font(const std::string &file, const std::string &configFile) : Font() {
@@ -34,9 +37,10 @@ void Font::load(const std::string &file, const std::string &configFile) {
     xStart = config->get_as<int>("xStart").value_or(0);
     yStart = config->get_as<int>("yStart").value_or(0);
     fillValue = config->get_as<unsigned int>("fillValue").value_or(0);
-    firstChar = (char)config->get_as<int>("firstChar").value_or(0);
+    firstChar = config->get_as<char>("firstChar").value_or(0);
     pixelSize = config->get_as<int>("pixelSize").value_or(0);
     gap = config->get_as<int>("gap").value_or(-1);
+    invertedColors = static_cast<bool>(config->get_as<int>("invertedColors").value_or(0));
 }
 
 int Font::width() {
@@ -69,6 +73,7 @@ bool Font::getPixel(char character, int x, int y) {
     int xPos = xIndex * (xSize + xOffset) + xStart;
     int yPos = yIndex * (ySize + yOffset) + yStart;
 
-    return bitmap.getPixel((xPos + x) * pixelSize, (yPos + y) * pixelSize) == fillValue;
+    bool value = bitmap.getPixel((xPos + x) * pixelSize, (yPos + y) * pixelSize) == fillValue;
+    return invertedColors != value;
 }
 
diff --git a/src/Font.h b/src/Font.hpp
similarity index 84%
rename from src/Font.h
rename to src/Font.hpp
index 30789d5..e97d4ac 100644
--- a/src/Font.h
+++ b/src/Font.hpp
@@ -2,10 +2,10 @@
 // Copyright (c) 2019 Julian Hinxlage. All rights reserved.
 //
 
-#ifndef TEXTRENDERER_FONT_H
-#define TEXTRENDERER_FONT_H
+#ifndef TEXTRENDERER_FONT_HPP
+#define TEXTRENDERER_FONT_HPP
 
-#include "Bitmap.h"
+#include "Bitmap.hpp"
 
 /**
  * @author: Julian Hinxlage
@@ -13,7 +13,7 @@
  * @brief: this class provides pixel access based on characters
  */
 class Font {
-public:
+private:
     Bitmap bitmap;
 
     //space between characters
@@ -38,6 +38,10 @@ public:
     int pixelSize;
     int gap;
 
+    bool invertedColors;
+
+public:
+
     Font();
     explicit Font(const std::string &file, const std::string &configFile);
     void load(const std::string &file, const std::string &configFile);
@@ -48,4 +52,4 @@ public:
 };
 
 
-#endif //TEXTRENDERER_FONT_H
+#endif //TEXTRENDERER_FONT_HPP
diff --git a/test/test_bitmap.cpp b/test/test_bitmap.cpp
index 1746a06..40951b8 100644
--- a/test/test_bitmap.cpp
+++ b/test/test_bitmap.cpp
@@ -1,6 +1,6 @@
+#include "Bitmap.hpp"
+#include "Font.hpp"
 #include <catch2/catch.hpp>
-#include "Bitmap.h"
-#include "Font.h"
 
 TEST_CASE("default values") {
     Bitmap bitmap = Bitmap();
@@ -20,7 +20,7 @@ TEST_CASE("Font") {
     Font font("../res/font1.bmp", "../res/font1.toml");
     REQUIRE(font.width() == 5);
     REQUIRE(font.height() == 7);
-    REQUIRE(!font.getPixel('a', 1,1));
+    REQUIRE_FALSE(font.getPixel('a', 1,1));
     REQUIRE(font.getPixel('a', 1,2));
 }