protected override void OnAppearing()
 {
     base.OnAppearing();
     Task.WhenAll(
         Box1.FadeTo(1, 500, Easing.SinIn),
         Box2.FadeTo(1, 500, Easing.SinIn),
         Box3.FadeTo(1, 500, Easing.SinIn),
         Box4.FadeTo(1, 500, Easing.SinIn),
         Box5.FadeTo(1, 500, Easing.SinIn),
         Box6.FadeTo(1, 500, Easing.SinIn),
         Box7.FadeTo(1, 500, Easing.SinIn),
         Box8.FadeTo(1, 500, Easing.SinIn),
         Box9.FadeTo(1, 500, Easing.SinIn));
 }