save project

snake.py

 import pygame
 from pygame import locals
-
+range_x=360
+range_y=360
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 
@@ -51,6 +52,9 @@ while True:
         y -= 30
     else:
         y += 30
+    if range_x==x and range_y==y:
+        range_x=random.randint(0,660)
+        range_y=random.randint(0,480)
     position.append((x, y))
     position.pop(0)
     # 将背景图画上去