WPF VB.Net

      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
    
    
      
        
          
            
              
                  
                                                Storyboard.TargetProperty="(Button.Background).(SolidColorBrush.Color)"
                                From="Red" To="Yellow" AutoReverse="True"
                                RepeatBehavior="Forever" />