auto save

snake.py

 import pygame
 from pygame import locals
-# 初始化pygame，为使用pygame做准备
 pygame.init()
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
-# 创建一个窗口
+x,y = 210,210
+FPSCLOCK = pygame.time.Clock()
 screen = pygame.display.set_mode((660,480))
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             exit()
     screen.blit(background,(0,0))
-    screen.blit(right,(210,210))    
+    screen.blit(right,(x,y))    
     screen.blit(food,(90,90))
     screen.blit(body,(180,210))    
     screen.blit(body,(150,210))    
     screen.blit(body,(150,180))
-    pygame.display.update()
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+    pygame.display.update()
+    FPSCLOCK.tick(3)
+    x += 30
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