diff --git a/my_game.py b/my_game.py
index a06965d..bf23878 100644
--- a/my_game.py
+++ b/my_game.py
@@ -107,7 +107,7 @@ while True:
                 obstacle = Block(bush,cacti,stone)  
                 block_list.add(obstacle)
         for sprite in block_list:       # 遍历、展示障碍物精灵
-            sprite.rect.x -= speed
+            sprite.rect.x -= 8
             screen.blit(sprite.image, (sprite.rect.x, sprite.rect.y)) 
             if sprite.rect.x <= 0-sprite.rect.width:
                 sprite.kill()
@@ -115,8 +115,6 @@ while True:
                 gameover = pygame.image.load('gameover.png')     # 游戏结束
                 screen.blit(gameover, (400, 200))
                 gamestate = False
-            else:
-                if (sprite.rect.x+sprite.rect.width)
         scoreSurf = basic_font.render("分数:"+str(score),True,(255,0,0))
         screen.blit(scoreSurf,(850,20))