screenfader7

    static IEnumerator FadeOutCoRoutine(float delayBefore, float delayAfter, System.Action callback)
    {
        yield return new WaitForSeconds(delayBefore);
        while(group.alpha < 1)
        {
            group.alpha = Mathf.MoveTowards(group.alpha, 1f, instance.speed * Time.deltaTime);
            yield return null;
        }
        yield return new WaitForSeconds(delayAfter);
        if (callback != null) callback();

    }