IEnumerator TutorialManager()
    {
        yield return(new WaitForSeconds(tutorialClips.clip.length + 1));

        Destroy(walls[0]);

        tutorialClips.PlayOneShot(audioClips[0]);
        yield return(new WaitForSeconds(audioClips[0].length));

        Destroy(walls[1]);

        tutorialClips.PlayOneShot(audioClips[1]);
        yield return(new WaitForSeconds(audioClips[1].length));

        Destroy(walls[2]);

        tutorialClips.PlayOneShot(audioClips[2]);
        yield return(new WaitForSeconds(audioClips[2].length));

        Destroy(walls[3]);

        StartCoroutine(displayTexts.Countdown());


        yield break;
    }