void OnTriggerEnter2D(Collider2D other)
 {
     if (other.gameObject.name == "Player")
     {
         Music_man.Switch_Track(new_track);
         gameObject.SetActive(false);
     }
 }
    // Start is called before the first frame update
    void Start()
    {
        Music_man = FindObjectOfType <Music_manager>();


        if (switch_on_start)
        {
            Music_man.Switch_Track(new_track);
            gameObject.SetActive(false);
        }
    }