auto save

snake.py

 import pygame
 from pygame import locals
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -53,6 +54,9 @@ while True:
         y += 30
     position.append((x, y))
     
+    if x==apple_x and y == apple_y:
+        
+        apple_x = random.randint(0,21)
     
     position.pop(0)
     # 将背景图画上去