diff --git a/settings.py b/settings.py
index 73fc2ce..7d921e0 100644
--- a/settings.py
+++ b/settings.py
@@ -18,3 +18,9 @@ class Settings():
         self.bullet_height = 15
         self.bullet_color = 60, 60, 60
         self.bullets_allowed = 3
+
+        # 外星人设置
+        self.alien_speed_factor = 0.1
+        self.fleet_drop_speed = 10
+
+        # 以什么样的速度加快游戏节奏
\ No newline at end of file