diff --git a/alien.py b/alien.py
index 211e639..7e911d5 100644
--- a/alien.py
+++ b/alien.py
@@ -16,4 +16,5 @@ class Alien(Sprite):
         self.rect = self.image.get_rect()
 
         # 每个外星人最初都在屏幕左上角附近
-        self.rect.x = self.rect.width
\ No newline at end of file
+        self.rect.x = self.rect.width
+        self.rect.y = self.rect.height
\ No newline at end of file