diff --git a/src/c1/main.cpp b/src/c1/threePoints.cpp
similarity index 75%
rename from src/c1/main.cpp
rename to src/c1/threePoints.cpp
index 5bdfe4a..45372bf 100644
--- a/src/c1/main.cpp
+++ b/src/c1/threePoints.cpp
@@ -1,12 +1,18 @@
-#include <chrono>
-#include <exception>
-#include <fstream>
 #include<glad/glad.h>
 #include<GLFW/glfw3.h>
+#include <chrono>
 #include <iostream>
 #include <stdexcept>
 #include <thread>
 
+void render(){
+    glBegin(GL_POINTS);
+    glVertex3f(0.0f,0.5f,0.0f);
+    glVertex3f(-0.5,-0.5,0.0f);
+    glVertex3f(0.5f,-0.5f,0.0f);
+    glEnd();
+}
+
 int main(){
     // 初始化GLFW
     if(glfwInit()==0){
@@ -28,10 +34,17 @@ int main(){
     
     std::cout<<"OpenGL version:"<<glGetString(GL_VERSION)<<"\n";
 
+    glClear(GL_COLOR_BUFFER_BIT);
+    glEnable(GL_POINT_SMOOTH);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+    glPointSize(64.0f);
+
     while(glfwWindowShouldClose(window)==false){
-        std::this_thread::sleep_for(std::chrono::milliseconds(1000/60));
+        render();
         glfwSwapBuffers(window);
         glfwPollEvents();
+        std::this_thread::sleep_for(std::chrono::milliseconds(1000/60));
     }
     return 0;
 }
diff --git a/xmake.lua b/xmake.lua
index 6bf6699..5b717a3 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -15,5 +15,5 @@ end
 add_requires("glfw","glad","glm")
 add_packages("glfw","glad","glm")
 
-target("c1")
-    add_files("src/c1/*.cpp")
\ No newline at end of file
+target("3point")
+    add_files("src/c1/threePoints.cpp")
\ No newline at end of file