diff --git a/test.py b/test.py
index a7d2703..24162a6 100644
--- a/test.py
+++ b/test.py
@@ -35,7 +35,10 @@ def main (
                          x = CWindow.WIDTH * 3 / 4, y = CWindow.HEIGHT - 120)
     balloon = Balloon (game)
     CurrentTime (game, SYSTEM_FONT)
-    Sound ('assets/bgm.mp3').play (loops = -1)
+    try:
+        Sound ('assets/bgm.mp3').play (loops = -1)
+    except Exception:
+        pass
     while True:
         for event in pygame.event.get ():
             if event.type == pygame.QUIT:
@@ -388,19 +391,17 @@ class KitaSun (GameObject):
     def redraw (
             self,
     ) -> None:
+        surface = pygame.transform.rotate (self.surface, -(90 + math.degrees (self.arg)))
+        self.game.screen.blit (surface, surface.get_rect (center = (self.x, self.y)))
+        super ().redraw ()
         self.game.sky.observer.date = datetime.now () - timedelta (hours = 9)
         self.sun.compute (self.game.sky.observer)
         self.alt = self.sun.alt
         self.az = self.sun.az
-        print (self.x, self.y)
-        self.game.screen.blit (
-                pygame.transform.rotate (self.surface, -(90 + math.degrees (self.arg))),
-                (self.x, self.y))
-        super ().redraw ()
+        if abs (self.new_arg - self.arg) > math.radians (15):
+            self.arg = self.new_arg
         self.x = self.new_x
         self.y = self.new_y
-        if abs (self.new_arg - self.arg) > math.radians (3):
-            self.arg = self.new_arg
 
     @property
     def new_x (