auto save

snake.py

 import pygame
+from pygame import locals
 
 # 初始化pygame，为使用pygame做准备
 pygame.init()
 
 # 创建一个窗口
-??
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+screen=pygame.display.set_mode((800,600))
+FPSCLOCK=pygame.time.Clock()
+bg=pygame.image.load('bg.png')
+right=pygame.image.load('right.png')
+apple=pygame.image.load('apple.png')
+body=pygame.image.load('body.png')
+x,y=240,120
+position=[(180,90),(180,120),(210,120),(x,y)]
+while True:
+    for event in pygame.event.get():
+        if event.type==locals.QUIT:
+            exit()
+    x +=30
+    position.append((x,y))
+    position.pop(0)
+    screen.blit(bg,(0,0))
+    screen.blit(right,position[-1])
+    for i in range(len(position)-1):
+        screen.blit(body,position[i])
+    screen.blit(apple,(360,300))
+    pygame.display.update()
+    FPSCLOCK.tick(3)
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