RepeatBehavior=2x
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Ellipse HorizontalAlignment="Center" VerticalAlignment="Center" Width="48" Fill="Red" Height="{Binding RelativeSource={RelativeSource self}, Path=Width}"> <Ellipse.Triggers> <EventTrigger RoutedEvent="Ellipse.Loaded"> <BeginStoryboard> <Storyboard TargetProperty="Width" RepeatBehavior="Forever"> <DoubleAnimation From="48" To="288" Duration="0:0:0.25" BeginTime="0:0:1" RepeatBehavior="2x" FillBehavior="Stop" /> </Storyboard> </BeginStoryboard> </EventTrigger> </Ellipse.Triggers> </Ellipse> </Page>