screenfader6

public static void FadeOut(float delayBefore = 0, float delayAfter = 0, System.Action callback = null)
    {
        if (callback == null) callback = DefaultCallback;
        group.gameObject.SetActive(true);
        StopActiveFades();
        fadeOutCR = instance.StartCoroutine(FadeOutCoRoutine(delayBefore, delayAfter,callback));
    }