save project

my_game.py

 import pygame
+import random
 from pygame import locals
-
 pygame.init()  # 初始化
 # 创建一个窗口
 screen = pygame.display.set_mode((1000, 600))
@@ -43,7 +43,6 @@ while True:
         index=index+1
         if index==5:
             index=0
-
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(road, (0, 500))