save project

snake.py

@@ -4,6 +4,7 @@ from pygame import locals
 pygame.init()
 background=pygame.image.load('bg.png')
 right=pygame.image.load("right.png")
+food=pygame.image.load("apple.png")
 
 # 创建一个窗口
 screen=pygame.display.set_mode((800,600))
@@ -12,6 +13,7 @@ while True:
         
         if a.type==locals.QUIT:
             exit()
-    sc
+    screen.blit(background,(0,0))
+
     screen.blit(food,(360,300))
     pygame.display.update()
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