diff --git a/alien_invasion.py b/alien_invasion.py
index 7f2d0eb..e6e3acb 100644
--- a/alien_invasion.py
+++ b/alien_invasion.py
@@ -25,7 +25,11 @@ class AlienInvasion:
         self.aliens = pygame.sprite.Group()
 
         self._create_fleet()
-
+        
+        # 背景音乐
+        pygame.mixer.music.load('music/flash.mp3')
+        pygame.mixer.music.play(-1)  # 重复循环
+        
         # 设置背景色
         self.bg_color = (230, 230, 230)