diff --git a/main/main.cpp b/main/main.cpp
index 6accb89..e698eb3 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -19,18 +19,31 @@ bool isQuit(std::string command);
 int main() {
     vkvm::initialize(0);
 
-    Font font("../res/font1.bmp", "../res/font1.toml");
-
-    std::string oldText;
     std::string currentText;
-    TextRenderer textRenderer(vkvm::Color(255, 255, 255), vkvm::Color(0, 0, 0));
+
+
+    /*************************set back to shared memory(only for test)********************************************/
+    vkvm::Color fontColor1(0, 0, 0);
+    vkvm::Color backgroudColor1(255, 255, 255);
+    Font font1("../res/font3.bmp", "../res/font3.toml");
+    vkvm::setFont(vkvm::FontType(3, "font", font1.height(), font1.width()));
+    vkvm::setForegroundColor(fontColor1);
+    vkvm::setBackgroundColor(backgroudColor1);
+    /**************************get text and font from shared memory*******************************************/
+    std::string fontResourcePath = "../res/font" + std::to_string(vkvm::getFont().getId())  + ".bmp";
+    std::string fontConfigureFilePath = "../res/font" + std::to_string(vkvm::getFont().getId())  + ".toml";
+    Font font = Font(fontResourcePath, fontConfigureFilePath);
+    TextRenderer textRenderer(vkvm::Color(255, 255, 255), vkvm::Color(0, 0, 0). font);
+    vkvm::Color fontColor = vkvm::getForegroundColor();
+    vkvm::Color backgroundColor = vkvm::getBackgroundColor();
+    /*********************************************************************/
 
     std::string command;
-
     std::cout << "TextRender: " << std::endl;
     std::getline(std::cin, command);
     while(!isQuit(command)) {
         if(command.compare("update")) {
+            vkvm::setText("Hello World.");
             currentText = vkvm::getText();
             textRenderer.update(currentText);
         }
diff --git a/res/font3.bmp b/res/font3.bmp
deleted file mode 100644
index 609d266..0000000
Binary files a/res/font3.bmp and /dev/null differ
diff --git a/src/TextRenderer.cpp b/src/TextRenderer.cpp
index b3a90b1..ca0c4e0 100644
--- a/src/TextRenderer.cpp
+++ b/src/TextRenderer.cpp
@@ -3,14 +3,14 @@
 //
 #include "TextRenderer.h"
 
-TextRenderer::TextRenderer(vkvm::Color backgroundColor, vkvm::Color fontColor)
-                            : backgroundColor(backgroundColor), fontColor(fontColor) {
+TextRenderer::TextRenderer(vkvm::Color backgroundColor, vkvm::Color fontColor, Font font)
+                            : backgroundColor(backgroundColor), fontColor(fontColor), font(font) {
     windowWidth = vkvm::getWidth();
     fontWidth = font.width();
     fontHeight = font.height();
 }
 
-void TextRenderer::update(std::string text) {
+void TextRenderer::update(std::string newText) {
     int startX;
     int startY;
     int i;
@@ -19,10 +19,6 @@ void TextRenderer::update(std::string text) {
 
     std::cout << "get window's width from shared memery: (" << windowWidth << ")" << std::endl;
 
-    std::string newText = vkvm::getText();
-
-    std::cout << "get text:" << newText << std::endl;
-
     for(i = 0; i < newText.size(); i++) {
         if(i > oldText.size() || oldText[i] != newText[i]) {
             startX = i % fontNumbersInOneLine * fontWidth;
@@ -32,6 +28,8 @@ void TextRenderer::update(std::string text) {
             translateToSharedMemory(characterBitmap, startX, startY);
         }
     }
+
+    oldText = newText;
 }
 
 void TextRenderer::setOldText(std::string text) {
diff --git a/src/TextRenderer.h b/src/TextRenderer.h
index 8d3679b..65ced25 100644
--- a/src/TextRenderer.h
+++ b/src/TextRenderer.h
@@ -22,7 +22,7 @@
  */
 class TextRenderer {
 public:
-    TextRenderer(vkvm::Color defaultBackgroundColor, vkvm::Color fontColor);
+    TextRenderer(vkvm::Color defaultBackgroundColor, vkvm::Color fontColor, Font font);
 
     void update(std::string text);
     void setOldText(std::string text);
@@ -33,7 +33,7 @@ private:
     vkvm::Color backgroundColor;
     vkvm::Color fontColor;
     vkvm::FontType fontType = vkvm::getFont();
-    Font font = Font(fontType.getName(), "../res/font3.toml");
+    Font font;
     int type;
     int windowWidth;
     int fontWidth;