void OnMouseUp()
 {
     if (Fc.gamestart)
     {
         Fc.CheckIfCorrect(pressedcolor);
         Fc.RandomMovement();
         Fc.ChangeColors();
     }
 }
    IEnumerator CountdownStart()
    {
        while (countdownTime > 0)
        {
            countdowntext.text = countdownTime.ToString();

            yield return(new WaitForSeconds(1f));

            countdownTime--;
        }

        countdowntext.text = "GO!";

        Fc = FindObjectOfType <FocusColor>();


        yield return(new WaitForSeconds(1f));

        focus.SetActive(true);
        Fc.gamestart = true;
        Fc.ChangeColors();
        countdowntext.gameObject.SetActive(false);
    }