save project

my_game.py

@@ -22,6 +22,7 @@ index = 0
 y = 400
 jumpState = "runing"
 t = 30
+bg_x=0
 road_x=0
 obstacle = random.choice([bush, stone, cacti])
 rect = obstacle.get_rect()
@@ -58,8 +59,12 @@ while True:
         index += 1
         if index >= 5:
             index = 0
-    # 将背景图画上去
-    screen.blit(background, (0, 0))     # 远处背景
+    # 将背景图画上去    # 远处背景
+    bg_x-=900
+    if bg_x<=-1000:
+        bg_x=0
+    screen.blit(background, (bg_x, 0)) 
+
     road_x-=8
     if road_x<=-1000:
         road_x=0