private void OnFlashTimerTick()

in Games/Memory/GamePage.xaml.cs [183:238]
45 lines of code
2 McCabe index (conditional complexity)

        private void OnFlashTimerTick(object sender, object e)
        {
            _reverseAnimationActive = true;
           
            //Flip button visual
            var btn1Visual = ElementCompositionPreview.GetElementVisual(_firstButton);
            var btn2Visual = ElementCompositionPreview.GetElementVisual(_secondButton);
            var compositor = btn1Visual.Compositor;

            //Get a visual for the content
            var btn1Content = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(_firstButton, 0), 0);
            var btn1ContentVisual = ElementCompositionPreview.GetElementVisual(btn1Content as FrameworkElement);
            var btn2Content = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(_secondButton, 0), 0);
            var btn2ContentVisual = ElementCompositionPreview.GetElementVisual(btn2Content as FrameworkElement);

            var easing = compositor.CreateLinearEasingFunction();
            
            if (_reverseFlipBatchAnimation != null)
            {
                _reverseFlipBatchAnimation.Completed -= ReverseFlipBatchAnimation_Completed;
                _reverseFlipBatchAnimation.Dispose();
            }

            _reverseFlipBatchAnimation = compositor.CreateScopedBatch(CompositionBatchTypes.Animation);
            _reverseFlipBatchAnimation.Completed += ReverseFlipBatchAnimation_Completed;

            ScalarKeyFrameAnimation flipAnimation = compositor.CreateScalarKeyFrameAnimation();
            flipAnimation.InsertKeyFrame(0.000001f, 0);
            flipAnimation.InsertKeyFrame(0.999999f, -180, easing);
            flipAnimation.InsertKeyFrame(1f, 0);
            flipAnimation.Duration = TimeSpan.FromMilliseconds(400);
            flipAnimation.IterationBehavior = AnimationIterationBehavior.Count;
            flipAnimation.IterationCount = 1;            
            btn1Visual.CenterPoint = new Vector3((float)(0.5 * _firstButton.ActualWidth), (float)(0.5f * _firstButton.ActualHeight), 0f);
            btn1Visual.RotationAxis = new Vector3(0.0f, 1f, 0f);
            btn2Visual.CenterPoint = new Vector3((float)(0.5 * _secondButton.ActualWidth), (float)(0.5f * _secondButton.ActualHeight), 0f);
            btn2Visual.RotationAxis = new Vector3(0.0f, 1f, 0f);

            ScalarKeyFrameAnimation appearAnimation = compositor.CreateScalarKeyFrameAnimation();
            appearAnimation.InsertKeyFrame(0.0f, 1);
            appearAnimation.InsertKeyFrame(0.399999f, 1);
            appearAnimation.InsertKeyFrame(0.4f, 0);
            appearAnimation.InsertKeyFrame(1f, 0);
            appearAnimation.Duration = TimeSpan.FromMilliseconds(400);
            appearAnimation.IterationBehavior = AnimationIterationBehavior.Count;
            appearAnimation.IterationCount = 1;

            btn1Visual.StartAnimation(nameof(btn1Visual.RotationAngleInDegrees), flipAnimation);
            btn2Visual.StartAnimation(nameof(btn2Visual.RotationAngleInDegrees), flipAnimation);
            btn1ContentVisual.StartAnimation(nameof(btn1ContentVisual.Opacity), appearAnimation);
            btn2ContentVisual.StartAnimation(nameof(btn2ContentVisual.Opacity), appearAnimation);
            _reverseFlipBatchAnimation.End();
           
            _flashTimer.Stop();
            GazeInput.SetInteraction(buttonMatrix, Interaction.Enabled);
        }