Unity DoTweenによるFade

    public async Task FadeIn()
    {
        //using DG.Tweening;
        //#0000 -> #000f
        bool flg = true;
        DOTween
         .ToAlpha(() => panel.color = new Color(0, 0, 0, 0), c => panel.color = c, 1f, 0.3f)
         .OnComplete(() => flg = false)
         ;
        while (flg) await Task.Delay(5);
    }
    public async Task FadeOut()
    {
        //using DG.Tweening;
        //#000f -> #0000
        bool flg = true;
        DOTween
         .ToAlpha(() => panel.color = new Color(0, 0, 0, 1f), c => panel.color = c, 0f, 0.3f)
         .OnComplete(() => flg = false)
         ;
        while (flg) await Task.Delay(5);
    }