save project

my_game.py

@@ -23,6 +23,7 @@ y = 400
 jumpState = "runing"
 t = 30
 road_x=0
+bg_x=0
 obstacle = random.choice([bush, stone, cacti])
 rect = obstacle.get_rect()
 rect.x = 1000
@@ -58,10 +59,14 @@ while True:
         index += 1
         if index >= 5:
             index = 0
+    bg_x-=10
+    if bg_x<=-1000:
+        bg_x=0
     # 将背景图画上去
-    screen.blit(background, (0, 0))
-    road_x-=8
+    screen.blit(background, (bg_x, 0))
+    road_x-=10
     if road_x<=-1000:
+        road_x=0
              # 远处背景
     screen.blit(road, (road_x, 500))
          # 路