xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Spline Key Frame Animation" Height="250" Width="400"> Storyboard.TargetName="ball1" Storyboard.TargetProperty="(Canvas.Left)" To="310" Duration="0:0:10" RepeatBehavior="Forever" />