<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Path Stroke="Black" StrokeThickness="4">
<Path.Data>
<LineGeometry StartPoint="50,50" EndPoint="0,0" />
</Path.Data>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<PointAnimationUsingPath AutoReverse="True"
RepeatBehavior="Forever" Duration="0:0:2"
Storyboard.TargetProperty="(Path.Data).(LineGeometry.EndPoint)">
<PointAnimationUsingPath.PathGeometry>
<PathGeometry Figures="M 14,14 A 50,50 90, 0 1 85,14" />
</PointAnimationUsingPath.PathGeometry>
</PointAnimationUsingPath>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
</Page>