// Update is called once per frame
    void Update()
    {
        if (DM.whetherNextRound())
        {
            DM.emitDisk(RD.getNextRoundNum(), RD.getNextRoundColor(), RD.getNextRoundSpeed());
            SR.nextRound();
            return;
        }
        if (Input.GetMouseButtonDown(0))
        {
            Vector3 mp = Input.mousePosition;

            Camera ca  = mainCamera.GetComponent <Camera> ();
            Ray    ray = ca.ScreenPointToRay(Input.mousePosition);

            RaycastHit hit;

            if (Physics.Raycast(ray, out hit))
            {
                if (hit.collider.gameObject.tag == "Disk")
                {
                    DM.shutDisk(hit.collider.gameObject);
                    SR.hitOne();
                }
            }
        }
    }