save project

my_game.py

@@ -28,6 +28,7 @@ rect.x = 1000
 rect.y = 500 - rect.height
 
 road_x = 0
+bg_x = 0
 
 while True:
     for event in pygame.event.get():
@@ -60,7 +61,10 @@ while True:
         if index >= 5:
             index = 0
     # 将背景图画上去
-    screen.blit(background, (0, 0))     # 远处背景
+    bg_x -= 1
+    if bg_x <= -1000:
+        bg_x = 0
+    screen.blit(background, (bg_x, 0))     # 远处背景
     road_x -= 8
     if road_x <= -1000:
         road_x = 0