save project

my_game.py

@@ -25,12 +25,14 @@ hero = [pygame.image.load('hero1.png'),
         pygame.image.load('hero3.png'),
         pygame.image.load('hero4.png'),
         pygame.image.load('hero5.png')]
+bg_x
 lu_x=0
 shan_x=0
 index = 0   
 y = 400
 jumpState = "runing"
 t = 30
+
 aa=Block(bush,cacti,stone)
 
 while True:
@@ -63,6 +65,10 @@ while True:
         index += 1
         if index >= 5:
             index = 0
+    bg_x-=1
+    if bg_x<=-1000:
+        bg_x = 0
+    screen.blit(road
     # 将背景图画上去
     shan_x -=2
     if shan_x <-1000: