private IEnumerator TransitionLeft()
    {
        highscoreText.enabled = false;
        RectTransform menuRT              = menuList[actualMenu].GetComponent <RectTransform>();
        Vector2       originalPosition    = menuRT.anchoredPosition;
        Vector2       targetPositionLeft  = originalPosition - Vector2.right * 1000;
        Vector2       targetPositionRight = originalPosition + Vector2.right * 1000;

        myBG.Change();
        while (menuRT.anchoredPosition != targetPositionLeft)
        {
            menuRT.anchoredPosition = Vector2.MoveTowards(menuRT.anchoredPosition, targetPositionLeft, transitionSpeed);
            yield return(new WaitForEndOfFrame());
        }
        ChangeMenu(1);
        menuRT = menuList[actualMenu].GetComponent <RectTransform>();
        menuRT.anchoredPosition = targetPositionRight;

        while (menuRT.anchoredPosition != originalPosition)
        {
            menuRT.anchoredPosition = Vector2.MoveTowards(menuRT.anchoredPosition, originalPosition, transitionSpeed);
            yield return(new WaitForEndOfFrame());
        }
    }