diff --git a/alien_invasion,py b/alien_invasion,py
index be701be..9e03140 100644
--- a/alien_invasion,py
+++ b/alien_invasion,py
@@ -45,4 +45,11 @@ def run_game():
         if stats.game_active:
             ship.update()
             gf.update_bullets(ai_settings, screen, stats, sb, ship, aliens,
-                              bullets)
\ No newline at end of file
+                              bullets)
+            gf.update_aliens(ai_settings, stats, screen, sb, ship, aliens, bullets)
+
+        gf.update_screen(ai_settings, screen, stats, sb, ship, aliens,
+                         bullets, play_button)                       
+
+
+run_game()
\ No newline at end of file