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Bouncing Ball with ParallelTimeline

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:s="clr-namespace:System;assembly=mscorlib">     <Ellipse Name="elips" Width="20" Height="20" Fill="Red"               Canvas.Left="200">         <Ellipse.Triggers>             <EventTrigger RoutedEvent="Ellipse.Loaded">                 <BeginStoryboard>                     <Storyboard TargetName="elips" RepeatBehavior="Forever">                         <DoubleAnimation                                  Storyboard.TargetProperty="(Canvas.Top)"                                 From="96" To="490" Duration="0:0:1"                                 AutoReverse="True"                                  AccelerationRatio="1" />                         <ParallelTimeline BeginTime="0:0:0.98"                                            AutoReverse="True">                             <DoubleAnimation Storyboard.TargetProperty="Width"                                              To="32" Duration="0:0:0.02" />                             <DoubleAnimation Storyboard.TargetProperty="Height"                                              To="16" Duration="0:0:0.02" />                             <DoubleAnimation                                      Storyboard.TargetProperty="(Canvas.Left)"                                     From="0" To="-4"  Duration="0:0:0.02"                                     IsAdditive="True" />                         </ParallelTimeline>                     </Storyboard>                 </BeginStoryboard>             </EventTrigger>         </Ellipse.Triggers>     </Ellipse> </Canvas>