xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
Storyboard.TargetProperty="(Canvas.Left)"
From="0" To="300" Duration="0:0:0.25"
AutoReverse="True"
RepeatBehavior="20x" />
Storyboard.TargetProperty="(Canvas.Top)"
From="0" To="480" Duration="0:0:5"
AutoReverse="True" />