public void Countdown2()
    {
        Count_Down.SetActive(true);
        Count_Down.GetComponent <Text>().text = count.ToString();

        print(count);



        count--;
        if (count <= 0)
        {
            CancelInvoke();
            Play_Task();
        }
    }  // count down is finished...
    public void Countdown()
    {
        Count_Down.SetActive(true);
        Count_Down.GetComponent <Text>().text = count.ToString();

        print(count);



        count--;
        if (count <= 0)
        {
            CancelInvoke();
            Start_Tutorial();
        }
    }