diff --git a/alien_invasion,py b/alien_invasion,py
index 4e9ecda..5622cb4 100644
--- a/alien_invasion,py
+++ b/alien_invasion,py
@@ -12,4 +12,7 @@ import game_functions as gf
 def run_game():
     # 初始化pygame、设置和屏幕对象
     pygame.init()
-    ai_settings = Settings()
\ No newline at end of file
+    ai_settings = Settings()
+    screen = pygame.display.set_mode(
+        (ai_settings.screen_width, ai_settings.screen_height))
+    pygame.display.set_caption("Alien Invasion")