diff --git a/popcorn/Assets/MyGame/Scenes/Main/Scripts/BulkOrderAchievedEffect.cs b/popcorn/Assets/MyGame/Scenes/Main/Scripts/BulkOrderAchievedEffect.cs
index f6d5f15b..aa8a6a2e 100644
--- a/popcorn/Assets/MyGame/Scenes/Main/Scripts/BulkOrderAchievedEffect.cs
+++ b/popcorn/Assets/MyGame/Scenes/Main/Scripts/BulkOrderAchievedEffect.cs
@@ -53,13 +53,14 @@ namespace MyGame.Scenes.Main.Scripts
                 {
                     onComplete?.Invoke();
                 });
-            Observable.Timer(TimeSpan.Zero, TimeSpan.FromSeconds(.1f))
-                .Take(heartCount)
-                .Subscribe(_ =>
+            for (int i = 0; i < heartCount; i++)
+            {
+                this.CallWaitForSeconds(.1f * i, () =>
                 {
                     var heart = Instantiate(heartPrefab, beginPos, Quaternion.identity, transform); 
                     Effect(heart, goalPos, () => effectCompleteSubject.OnNext(Unit.Default));
-                }).AddTo(this);
+                });
+            }
         }
 
         private void Effect(Transform target, Vector3 goalPos, Action onComplete = null)