save project

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
 screen=pygame.display.set_mode((660,480))
 
-backgrounb=pygame.image.load('bg.png')
+background=pygame.image.load('bg.png')
 apple=pygame.image.load('apple.png')
 right=pygame.image.load('right.png')
 body=pygame.image.load('body.png')
@@ -16,10 +16,10 @@ while True:
         if event.type==locals.QUIT:
             exit()
 
-    screen.blit(backgrounb,(0,0))
+    screen.blit(background,(0,0))
     screen.blit(right,(240,120))
     screen.blit(apple,(360,300))
     screen.blit(body,(240,90))
     screen.blit(body,(210,90))
     screen.blit(body,(210,60))
-    pygame.display.urgent()
+    pygame.display.update()