<Canvas
   xmlns="http://schemas.microsoft.com/client/2007"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <Canvas.Triggers>
    <EventTrigger RoutedEvent="Canvas.Loaded">
      <EventTrigger.Actions>
        <BeginStoryboard>
        </BeginStoryboard>
      </EventTrigger.Actions>
    </EventTrigger>
  </Canvas.Triggers>
  <Ellipse x:Name="ellipse"
      Height="20" Width="20" Canvas.Left="30" Canvas.Top="30"
      Fill="black"/>
</Canvas>
