// ensures a single instance on the bound object
 // SINGLETON PATTERN
 void Awake()
 {
     if (instance == null)
     {
         instance = this;
     }
     else if (instance != this)
     {
         Destroy(gameObject);
     }
 }
 void Start()
 {
     audioHandler = TestAudioHandler.instance;
     StartCoroutine(AudioTester());
     coroutine = WaitAndChangeScene(5.0f);
 }