private IEnumerator ReadySetGo()
    {
        float time = 4f;
        Text  show = Instantiate(announcer,
                                 GameObject.FindGameObjectWithTag("CanvasHUD")
                                 .transform).GetComponent <Text>();

        string[] text = { "Go!", "1", "2", "3" };

        while (time > 0f)
        {
            time     -= Time.deltaTime;
            show.text = "" + text[(int)time];
            yield return(null);
        }
        powerTime = 0;
        pacStudent.SetHitBox(true);
        music.PlayOST(0);
        Destroy(show.gameObject);
    }