diff --git a/C_CPP/render.h b/C_CPP/render.h
index 92b2c58..84465e7 100644
--- a/C_CPP/render.h
+++ b/C_CPP/render.h
@@ -10,15 +10,6 @@
 #define N DIM
 #define N1 (DIM - 1)
 
-unsigned char RD(int x, int y, float t) {
-  // TODO: YOUR CODE HERE
-  return 0;
-}
-unsigned char GR(int x, int y, float t) {
-  // TODO: YOUR CODE HERE
-  return 0;
-}
-unsigned char BL(int x, int y, float t) {
-  // TODO: YOUR CODE HERE
-  return 0;
-}
\ No newline at end of file
+unsigned char RD(int x, int y, float t) {v2 c=v2(-0.8,cos(t)*0.2);v2 z = v2(2.0*x/f(N-1)-1.0,2.0*(f(y)/N-0.5));int i=0;while(no2(z)<20&&i<50){v2 s=v2(z.x*z.x-z.y*z.y,z.x*z.y*2.0);z=a2(c,s);i++;}return 255-i*5.1;}
+unsigned char GR(int x, int y, float t) {v2 c=v2(-0.8,cos(t)*0.2);v2 z = v2(2.0*x/f(N-1)-1.0,2.0*(f(y)/N-0.5));int i=0;while(no2(z)<20&&i<50){v2 s=v2(z.x*z.x-z.y*z.y,z.x*z.y*2.0);z=a2(c,s);i++;}return 255-i*5.1;}
+unsigned char BL(int x, int y, float t) {v2 c=v2(-0.8,cos(t)*0.2);v2 z = v2(2.0*x/f(N-1)-1.0,2.0*(f(y)/N-0.5));int i=0;while(no2(z)<20&&i<50){v2 s=v2(z.x*z.x-z.y*z.y,z.x*z.y*2.0);z=a2(c,s);i++;}return 255-i*5.1;}
diff --git a/README.md b/README.md
index 1bb6298..c986fe1 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 ![JuliaSet](./assets/example.gif)
 
 举个例子，上面的JuliaSet图像我们可以用下面的代码生成：
-
+ 
 ```c++
 unsigned char RD(int x, int y, float t) {v2 c=v2(-0.8,cos(t)*0.2);v2 z = v2(2.0*x/f(N-1)-1.0,2.0*(f(y)/N-0.5));int i=0;while(no2(z)<20&&i<50){v2 s=v2(z.x*z.x-z.y*z.y,z.x*z.y*2.0);z=a2(c,s);i++;}return 255-i*5.1;}
 unsigned char GR(int x, int y, float t) {v2 c=v2(-0.8,cos(t)*0.2);v2 z = v2(2.0*x/f(N-1)-1.0,2.0*(f(y)/N-0.5));int i=0;while(no2(z)<20&&i<50){v2 s=v2(z.x*z.x-z.y*z.y,z.x*z.y*2.0);z=a2(c,s);i++;}return 255-i*5.1;}