save project

snake.py

@@ -2,14 +2,15 @@ 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")
 # 创建一个窗口
 screen = pygame.display.set_mode((800,600))
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             exit()
-
+    screen.blit(background, (0,0))
+