IEnumerator CountdownToStart()
    {
        game_Manager.Pause_The_Game();  // Cars cannot move
        while (counter > 0)
        {
            countdownDisplay.text = counter.ToString();
            yield return(new WaitForSeconds(1f));  // Wait 1 sc

            counter--;
        }

        countdownDisplay.text = "GO!";
        game_Manager.Resume_The_Game();               // Cars can move

        yield return(new WaitForSeconds(1f));         // Wait 1 sc

        countdownDisplay.gameObject.SetActive(false); // Deactivate CDT
    }