new Task(() =>
                {
                    for (var x = 0;x<4;x++)
                    {
                        foreach (var i in themes)
                        {

                            Application.Current.Dispatcher.BeginInvoke(
                                DispatcherPriority.Background,
                                new System.Action(
                                    () =>
                                        ThemeManager.ChangeTheme(this, new Accent(i.Name, i.URI),
                                            Theme.Light))).Wait();

                            Thread.Sleep(5);

                        }
                    }

                    Application.Current.Dispatcher.BeginInvoke(
                                DispatcherPriority.Background,
                                new System.Action(
                                    () =>
                                        ThemeManager.ChangeTheme(this, new Accent(themes[11].Name, themes[11].URI),
                                            Theme.Dark)));

                }).Start();