private void OnTriggerStay(Collider other)
    {
        bool shiftkey = Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift);

        if (other.name == "Key1" && Input.GetKeyDown(KeyCode.D) && shiftkey == true)
        {
            ui.CountS();
            Destroy(gameObject);
        }
        else if (other.name == "Key2" && Input.GetKeyDown(KeyCode.F) && shiftkey == true)
        {
            ui.CountS();
            Destroy(gameObject);
        }
        else if (other.name == "Key3" && Input.GetKeyDown(KeyCode.J) && shiftkey == true)
        {
            ui.CountS();
            Destroy(gameObject);
        }
        else if (other.name == "Key4" && Input.GetKeyDown(KeyCode.K) && shiftkey == true)
        {
            ui.CountS();
            Destroy(gameObject);
        }
    }