diff --git a/src/c1/threePoints.cpp b/src/c1/threePoints.cpp
index a604e89..f8c84af 100644
--- a/src/c1/threePoints.cpp
+++ b/src/c1/threePoints.cpp
@@ -11,6 +11,21 @@
 
 const float POINT_SIZE = 32.0f;
 
+class BouncyBall{
+public:
+    int bx=0,by=0,bsx=5,bsy=7;
+    BouncyBall(int x,int y,int speedX,int speedY):bx(x),by(y),bsx(speedX),bsy(speedY){}
+    BouncyBall* update(){
+        bx+=bsx,by+=bsy;
+        if(bx>=1000||bx<=-1000){
+            bsx=-bsx;
+        }
+        if(by>=1000||by<=-1000){
+            bsy=-bsy;
+        }
+        return this;
+    }
+};
 
 void render(){
     glBegin(GL_TRIANGLES);
@@ -34,15 +49,12 @@ void render(){
         speed=0.01f;
     }
     glColor3f(num/1.11f,1.0f-(num/1.12f),num/1.13f);
-    static int bx=0,by=0,bsx=5,bsy=7;
-    glVertex3f(float(bx)/1000.0f,float(by)/1000.0f,0.0f);
-    bx+=bsx,by+=bsy;
-    if(bx>=1000||bx<=-1000){
-        bsx=-bsx;
-    }
-    if(by>=1000||by<=-1000){
-        bsy=-bsy;
-    }
+    
+    static BouncyBall b1(0,0,5,6),b2(500,70,3,-6),b3(-250,-100,-40,-25);
+    glVertex3f(float(b1.bx)/1000.0f,float(b1.by)/1000.0f,0.0f);
+    glVertex3f(float(b2.bx)/1000.0f,float(b2.by)/1000.0f,0.0f);
+    glVertex3f(float(b3.bx)/1000.0f,float(b3.by)/1000.0f,0.0f);
+    b1.update(),b2.update(),b3.update();
     glEnd();
 }
 
@@ -86,5 +98,6 @@ int main(){
 #include<Windows.h>
 int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
     main();
+    return 0;
 }
 #endif
\ No newline at end of file