private IEnumerator ColorCube()
    {
        gc.SetGuideNum(Guides.COLORING);

        gameObject.AddComponent <CubeColorer>();

        //All buttons except play/pause button are disabled
        nextButton.GetComponent <Button>().interactable       = lastButton.GetComponent <Button>().interactable =
            fasterButton.GetComponent <Button>().interactable = slowerButton.GetComponent <Button>().interactable = false;

        playPauseButton.GetComponent <Button>().interactable = true;
        playPauseButton.GetComponent <Image>().sprite        = play;
        isPaused = true;

        while (true)
        {
            yield return(new WaitUntil(() => !isPaused));

            if (CubeSolver.IsValidConfiguration(ct.GetBlocks()))
            {
                CubeColorer cc = gameObject.GetComponent <CubeColorer>();
                if (cc != null)
                {
                    Destroy(cc);
                }
                StartCoroutine(SolveCube(false));
                yield break;
            }
        }
    }