auto save

snake.py

 import pygame
-
+from pygame import locals
 # 初始化pygame，为使用pygame做准备
 pygame.init()
-
+bg = pygame.image.load("bg.png")
 # 创建一个窗口
-sc = pygame.display.set_mode((660,480))
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+sc = pygame.display.set_mode((660,480))
+while True:
+    for e in pygame.event.get():
+        if e.type == locals.QUIT:
+            exit()
+    sc.blit(bg,(0,0))
+
+    pygame.display.update()
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