diff --git a/OpenGL/hello/src/cube.fs b/OpenGL/hello/src/cube.fs
index 105f994..835b4fa 100644
--- a/OpenGL/hello/src/cube.fs
+++ b/OpenGL/hello/src/cube.fs
@@ -1,25 +1,32 @@
 #version 330 core
 out vec4 FragColor;
 
-in vec3 Normal;  
-in vec3 FragPos;  
-  
-uniform vec3 lightPos; 
+in vec3 Normal;
+in vec3 FragPos;
+
+uniform vec3 lightPos;
 uniform vec3 lightColor;
 uniform vec3 objectColor;
+uniform vec3 viewPos;
 
-void main()
-{
-    // ambient
-    float ambientStrength = 0.1;
-    vec3 ambient = ambientStrength * lightColor;
-  	
-    // diffuse 
-    vec3 norm = normalize(Normal);
-    vec3 lightDir = normalize(lightPos - FragPos);
-    float diff = max(dot(norm, lightDir), 0.0);
-    vec3 diffuse = diff * lightColor;
-            
-    vec3 result = (ambient + diffuse) * objectColor;
-    FragColor = vec4(result, 1.0);
-} 
\ No newline at end of file
+void main() {
+  // 环境
+  float ambientStrength = 0.1;
+  vec3 ambient = ambientStrength * lightColor;
+
+  // 漫反射
+  vec3 norm = normalize(Normal);
+  vec3 lightDir = normalize(lightPos - FragPos);
+  float diff = max(dot(norm, lightDir), 0.0);
+  vec3 diffuse = diff * lightColor;
+
+  // 镜面
+  float specularStrength = 0.5;
+  vec3 viewDir = normalize(viewPos - FragPos);
+  vec3 reflectDir = reflect(-lightDir, norm);
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), 64);
+  vec3 specular = specularStrength * spec * lightColor;
+
+vec3 result = (ambient + diffuse + specular) * objectColor;
+  FragColor = vec4(result, 1.0);
+}
\ No newline at end of file
diff --git a/OpenGL/hello/src/light.fs b/OpenGL/hello/src/light.fs
index 674ab6e..1c649f4 100644
--- a/OpenGL/hello/src/light.fs
+++ b/OpenGL/hello/src/light.fs
@@ -1,8 +1,7 @@
 #version 330 core
 out vec4 FragColor;
-uniform vec3 lightColor;
 
 void main()
 {
-    FragColor = vec4(lightColor, 1.0); // set all 4 vector values to 1.0
+    FragColor = vec4(1.0); // set all 4 vector values to 1.0
 }
\ No newline at end of file
diff --git a/OpenGL/hello/src/main.cpp b/OpenGL/hello/src/main.cpp
index a0c9606..67b533e 100644
--- a/OpenGL/hello/src/main.cpp
+++ b/OpenGL/hello/src/main.cpp
@@ -69,18 +69,6 @@ int main() {
   glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void *)0);
   glEnableVertexAttribArray(0);
 
-  // 激活着色器
-  shader.use();
-  // 绑定纹理
-  shader.setInt("texture1", 0);
-  shader.setInt("texture2", 1);
-  shader.setVec3("lightColor", 1.0f, 1.0f, 1.0f);
-  shader.setVec3("objectColor", 1.0f, 0.5f, 0.31f);
-
-  lightShader.use();
-  lightShader.setVec3("lightColor", 1.0f, 1.0f, 1.0f);
-  lightShader.setVec3("lightPos", lightPos);
-
   // 开启深度测试
   glEnable(GL_DEPTH_TEST);
 
@@ -99,44 +87,37 @@ int main() {
     glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
-    glm::mat4 view = camera.GetViewMatrix();
+    lightPos.x = 1.0f + sin(glfwGetTime()) * 2.0f;
+    lightPos.y = sin(glfwGetTime() / 2.0f) * 1.0f;
 
+    glm::mat4 view = camera.GetViewMatrix();
     glm::mat4 projection =
         glm::perspective(glm::radians(camera.Zoom),
                          (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
+    glm::mat4 model = glm::mat4(1.0f);
 
     // 绘制三角形
     shader.use();
-
+    shader.setVec3("objectColor", 1.0f, 0.5f, 0.31f);
+    shader.setVec3("lightColor", 1.0f, 1.0f, 1.0f);
+    shader.setVec3("lightPos", lightPos);
+    shader.setVec3("viewPos", camera.Position);
+    shader.setMat4("model", model);
     shader.setMat4("projection", projection);
     shader.setMat4("view", view);
-    // 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));
-    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 + 50.0f;
-      model =
-          glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
-      shader.setMat4("model", model);
-
-      glDrawArrays(GL_TRIANGLES, 0, 36);
-    }
-
-    lightShader.use();
-
-    glm::mat4 model = glm::mat4(1.0f);
+    model = glm::mat4(1.0f);
     model = glm::translate(model, lightPos);
     model = glm::scale(model, glm::vec3(0.2f)); // a smaller cube
-    glBindVertexArray(lightVAO);
+
+    lightShader.use();
     lightShader.setMat4("projection", projection);
     lightShader.setMat4("view", view);
     lightShader.setMat4("model", model);
 
+    glBindVertexArray(lightVAO);
     glDrawArrays(GL_TRIANGLES, 0, 36);
 
     // 检查并调用事件，交换缓冲