save project

my_game.py

@@ -18,7 +18,8 @@ hero = [pygame.image.load('hero1.png'),
         pygame.image.load('hero3.png'),
         pygame.image.load('hero4.png'),
         pygame.image.load('hero5.png')]
-
+bg=0
+road_x=0
 index = 0 
 a='running'
 y=400
@@ -27,6 +28,7 @@ b=random.choice([apple,stone,cacti])
 rect=b.get_rect()
 rect.x=1000
 rect.y=500-rect.height
+
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -49,15 +51,22 @@ while True:
             a='runing'
             t=30
 
-
     wk=hero[index]
     if a=='runing':
         index+=1
         if index==5:
             index=0
     # 将背景图画上去
-    screen.blit(background, (0, 0))
-    screen.blit(road, (0, 500))
+    bg-=2
+    if bg<=-1000:
+        bg=0
+    screen.blit(background,(bg,0))
+    road_x-=8
+    if road_x<=-1000:
+        road_x=0
+    screen.blit(road(road_x,500))
+    screen.blit(background, (bg, 0))
+    screen.blit(road, (road_x, 500))
     screen.blit(wk, (150, y))
     if rect.x<=0-rect.width:
         b=random.choice([apple,stone,cacti])