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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+background = pygame.image.load("bg.png")
+right = pygame.image.load("right.png")
+apple = pygame.image.load("apple.png")
+
+screen = pygame.display.set_mode((600,480))
+while True:
+    for event in pygame.event.get():
+        if event.type == locals.QUIT:
+            exit()
+    
+    screen.blit(background, (0,0))
+    screen.blit(right, (240,120))
+    screen.blit(apple, (360,300))
+    pygame.display.update()    #刷新游戏画面
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