diff --git a/OpenGL/hello/src/main.cpp b/OpenGL/hello/src/main.cpp
index 0f774cf..be3dd31 100644
--- a/OpenGL/hello/src/main.cpp
+++ b/OpenGL/hello/src/main.cpp
@@ -9,61 +9,36 @@
 #include <iostream>
 
 float vertices[] = {
-    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-     0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
-     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, 0.5f,  -0.5f, -0.5f, 1.0f, 0.0f,
+    0.5f,  0.5f,  -0.5f, 1.0f, 1.0f, 0.5f,  0.5f,  -0.5f, 1.0f, 1.0f,
+    -0.5f, 0.5f,  -0.5f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
 
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-     0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-     0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-     0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-    -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, 0.5f,  -0.5f, 0.5f,  1.0f, 0.0f,
+    0.5f,  0.5f,  0.5f,  1.0f, 1.0f, 0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
+    -0.5f, 0.5f,  0.5f,  0.0f, 1.0f, -0.5f, -0.5f, 0.5f,  0.0f, 0.0f,
 
-    -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-    -0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-    -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+    -0.5f, 0.5f,  0.5f,  1.0f, 0.0f, -0.5f, 0.5f,  -0.5f, 1.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f, -0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, -0.5f, 0.5f,  0.5f,  1.0f, 0.0f,
 
-     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-     0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-     0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-     0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+    0.5f,  0.5f,  0.5f,  1.0f, 0.0f, 0.5f,  0.5f,  -0.5f, 1.0f, 1.0f,
+    0.5f,  -0.5f, -0.5f, 0.0f, 1.0f, 0.5f,  -0.5f, -0.5f, 0.0f, 1.0f,
+    0.5f,  -0.5f, 0.5f,  0.0f, 0.0f, 0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
 
-    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-     0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
-     0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-     0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-    -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-    -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f, 0.5f,  -0.5f, -0.5f, 1.0f, 1.0f,
+    0.5f,  -0.5f, 0.5f,  1.0f, 0.0f, 0.5f,  -0.5f, 0.5f,  1.0f, 0.0f,
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, -0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
 
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-     0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-     0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-    -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
-    -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
-};
+    -0.5f, 0.5f,  -0.5f, 0.0f, 1.0f, 0.5f,  0.5f,  -0.5f, 1.0f, 1.0f,
+    0.5f,  0.5f,  0.5f,  1.0f, 0.0f, 0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
+    -0.5f, 0.5f,  0.5f,  0.0f, 0.0f, -0.5f, 0.5f,  -0.5f, 0.0f, 1.0f};
 
 glm::vec3 cubePositions[] = {
-  glm::vec3( 0.0f,  0.0f,  0.0f), 
-  glm::vec3( 2.0f,  5.0f, -15.0f), 
-  glm::vec3(-1.5f, -2.2f, -2.5f),  
-  glm::vec3(-3.8f, -2.0f, -12.3f),  
-  glm::vec3( 2.4f, -0.4f, -3.5f),  
-  glm::vec3(-1.7f,  3.0f, -7.5f),  
-  glm::vec3( 1.3f, -2.0f, -2.5f),  
-  glm::vec3( 1.5f,  2.0f, -2.5f), 
-  glm::vec3( 1.5f,  0.2f, -1.5f), 
-  glm::vec3(-1.3f,  1.0f, -1.5f)  
-};
+    glm::vec3(0.0f, 0.0f, 0.0f),    glm::vec3(2.0f, 5.0f, -15.0f),
+    glm::vec3(-1.5f, -2.2f, -2.5f), glm::vec3(-3.8f, -2.0f, -12.3f),
+    glm::vec3(2.4f, -0.4f, -3.5f),  glm::vec3(-1.7f, 3.0f, -7.5f),
+    glm::vec3(1.3f, -2.0f, -2.5f),  glm::vec3(1.5f, 2.0f, -2.5f),
+    glm::vec3(1.5f, 0.2f, -1.5f),   glm::vec3(-1.3f, 1.0f, -1.5f)};
 
 void framebuffer_size_callback(GLFWwindow *window, int width, int height);
 void processInput(GLFWwindow *window);
@@ -183,14 +158,11 @@ int main() {
   shader.setInt("texture2", 1);
 
   // create transformations
-  glm::mat4 model = glm::mat4(1.0f);
   glm::mat4 view = glm::mat4(1.0f);
   glm::mat4 projection = glm::mat4(1.0f);
-  model = glm::rotate(model, glm::radians(-55.0f), glm::vec3(1.0f, 0.0f, 0.0f));
   view = glm::translate(view, glm::vec3(0.0f, 0.0f, -3.0f));
   projection = glm::perspective(
       glm::radians(45.0f), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
-  shader.setMat4("model", model);
   shader.setMat4("view", view);
   shader.setMat4("projection", projection);
 
@@ -204,7 +176,7 @@ int main() {
 
     // 设置为白色
     glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
-    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
     // 绑定纹理
     glActiveTexture(GL_TEXTURE0);
@@ -217,11 +189,20 @@ int main() {
 
     // 设置变换矩阵
     glm::mat4 trans(1.0f);
-    trans = glm::rotate(trans, (float)glfwGetTime(), glm::vec3(0.0, 0.25,
-    0.0));
+    trans = glm::rotate(trans, (float)glfwGetTime(), glm::vec3(0.0, 0.25, 0.0));
     shader.setMat4("trans", trans);
     glBindVertexArray(VAO);
-    glDrawArrays(GL_TRIANGLES, 0, 36);
+
+    for (unsigned int i = 0; i < 10; i++) {
+      glm::mat4 model(1.0f);
+      model = glm::translate(model, cubePositions[i]);
+      float angle = 20.0f * i;
+      model =
+          glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
+      shader.setMat4("model", model);
+
+      glDrawArrays(GL_TRIANGLES, 0, 36);
+    }
 
     // 检查并调用事件，交换缓冲
     glfwSwapBuffers(window);