WPF simle animation...need help

thank you...you've made a student very happy..

thank you again

<Window x:Class="triunghipenote.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="439" Width="725"><Grid><Canvas Height="104" HorizontalAlignment="Left" Margin="74,24,0,0" Name="Canvas1" VerticalAlignment="Top" Width="164" /><Line x:Name="linia0" Opacity="0"
          X1="150" Y1="150"
          X2="350" Y2="290"
          Stroke="Black"
          StrokeThickness="3" Margin="-9,-12,0,0" /><Line x:Name="linia1" Opacity="0"
  X1="142" Y1="138"
  X2="300" Y2="50"
  Stroke="Black"
  StrokeThickness="3" /><Line x:Name="linia2" Opacity="0"
  X1="299" Y1="51"
  X2="340" Y2="278"
  Stroke="Black"
  StrokeThickness="3" /><Line x:Name="linia3" Opacity="0"
  X1="142" Y1="138"
  X2="320" Y2="164"
  Stroke="Red"
  StrokeThickness="4" /><Line x:Name="linia4" Opacity="0"
  X1="300" Y1="50"
  X2="240" Y2="207"
  Stroke="Red"
  StrokeThickness="4" /><Line x:Name="linia5" Opacity="0"
  X1="340" Y1="278"
  X2="220" Y2="93"
  Stroke="Red"
  StrokeThickness="4" /><StackPanel x:Name="rootElement"><StackPanel.Resources><Storyboard x:Key="mystoryboard"><DoubleAnimation
            Storyboard.TargetName="linia0"
            Storyboard.TargetProperty="Opacity"
            BeginTime="0:0:1"
            From="0.0" To="1.0" Duration="0:0:3"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement"><DiscreteObjectKeyFrame KeyTime="0:0:1" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia1"
            Storyboard.TargetProperty="Opacity"
            From="0.0" To="1.0" Duration="0:0:3"
            BeginTime="0:0:5"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement1"><DiscreteObjectKeyFrame KeyTime="0:0:4" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia2"
            Storyboard.TargetProperty="Opacity"
            From="0.0" To="1.0" Duration="0:0:3"
            BeginTime="0:0:8"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement2"><DiscreteObjectKeyFrame KeyTime="0:0:7" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia3"
            Storyboard.TargetProperty="Opacity"
            From="0.0" To="1.0" Duration="0:0:3"
            BeginTime="0:0:11"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement3"><DiscreteObjectKeyFrame KeyTime="0:0:11" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia4"
            Storyboard.TargetProperty="Opacity"
            From="0.0" To="1.0" Duration="0:0:3"
            BeginTime="0:0:14"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement4"><DiscreteObjectKeyFrame KeyTime="0:0:14" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia5"
            Storyboard.TargetProperty="Opacity"
            From="0.0" To="1.0" Duration="0:0:3"
            BeginTime="0:0:17"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement5"><DiscreteObjectKeyFrame KeyTime="0:0:17" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia3"
            Storyboard.TargetProperty="StrokeThickness"
            From="4" To="12" Duration="0:0:3"
            BeginTime="0:0:19"
            AutoReverse="False" /><ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(MediaElement.LoadedBehavior)" Storyboard.TargetName="mediaElement6"><DiscreteObjectKeyFrame KeyTime="0:0:20" Value="{x:Static MediaState.Play}"/></ObjectAnimationUsingKeyFrames><DoubleAnimation
            Storyboard.TargetName="linia4"
            Storyboard.TargetProperty="StrokeThickness"
            From="4" To="12" Duration="0:0:3"
            BeginTime="0:0:19"
            AutoReverse="False" /><DoubleAnimation
            Storyboard.TargetName="linia5"
            Storyboard.TargetProperty="StrokeThickness"
            From="4" To="12" Duration="0:0:3"
            BeginTime="0:0:19"
            AutoReverse="False" /></Storyboard></StackPanel.Resources><Button Content="Click" Height="42" Name="button12" Width="53" Click="button12_Click" /></StackPanel><MediaElement x:Name="mediaElement" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="do jos-sol jos.mp3" LoadedBehavior="Manual"/><MediaElement x:Name="mediaElement1" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="sol jos-sol.mp3" LoadedBehavior="Manual"/><MediaElement x:Name="mediaElement2" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="do jos-sol.mp3" LoadedBehavior="Manual"/><MediaElement x:Name="mediaElement3" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="sol jos-mi.mp3" LoadedBehavior="Manual"/><MediaElement x:Name="mediaElement4" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="mi jos-sol.mp3" LoadedBehavior="Manual"/><MediaElement x:Name="mediaElement5" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="do jos-do.mp3" LoadedBehavior="Manual"/><MediaElement x:Name="mediaElement6" HorizontalAlignment="Left" Height="100" VerticalAlignment="Bottom" Width="100" Margin="44,0,0,97" Visibility="Hidden" Source="acord.mp3" LoadedBehavior="Manual"/></Grid></Window>