auto save

snake.py

@@ -12,7 +12,7 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
-pygame.time.Clock.tick()
+s=pygame.time.Clock.tick()
 
 while True:
     for event in pygame.event.get():
@@ -29,5 +29,6 @@ while True:
     screen.blit(body, (180, 90))
     # 将果实画上去
     screen.blit(food, (360, 300))
+    s.tick(3)
     # 刷新画面
     pygame.display.update()
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