delete .vs

.gitignore

-*/.vs
+/.vs
 /Library
 /Temp
+.vs
\ No newline at end of file

Assets/Scripts/BackgroundChanger.cs

@@ -8,7 +8,6 @@ public class BackgroundChanger : MonoBehaviour {
     private List<GameObject> obstacleGroup = new List<GameObject>();
     private GameObject[] gameObjectGroup;
     private GameObject background;
-    private GameObject obstacle;
     private string[] colors = {"Blue", "Green" };
         
     public void Start()
@@ -31,10 +30,13 @@ public class BackgroundChanger : MonoBehaviour {
     {
         foreach(string color in colors)
         {
-            obstacle = GameObject.FindWithTag(color + "Obstacle");
+            gameObjectGroup = GameObject.FindGameObjectsWithTag(color + "Obstacle");
+            foreach(GameObject obstacle in gameObjectGroup)
+            {
                 obstacleGroup.Add(obstacle);
             }
         }
+    }
 
     public void Update()
     {