Помогите найти ошибку, необходимо по нажатию кнопки, чтобы она меня цвет наполовину, и цвет держался несколько секунд, у меня она просто меняет цвет
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<Window x:Class="WpfApplication12.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<ControlTemplate x:Key="TemplateB" TargetType="Button">
<Border BorderBrush="Orange" BorderThickness="3" CornerRadius="2" Name="bor"
TextBlock.Foreground="Red">
<Border.Background>
<LinearGradientBrush>
<GradientStopCollection>
<GradientStop Offset="0" Color="Yellow"></GradientStop>
<GradientStop Offset="1" Color="Green"></GradientStop>
</GradientStopCollection>
</LinearGradientBrush>
</Border.Background>
<ContentPresenter RecognizesAccessKey="True" Margin="{TemplateBinding Padding}"></ContentPresenter>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="bor" Property="Background" Value="Green"></Setter>
</Trigger>
<!--Trigger Property="IsPressed" Value="True">
<Setter TargetName="bor" Property="Background" Value="Red"></Setter>
</Trigger-->
</ControlTemplate.Triggers>
</ControlTemplate>
<ControlTemplate x:Key="TemplateA" TargetType="Button">
<Border Name="bor"
TextBlock.Foreground="Red">
<Border.Background>
<LinearGradientBrush>
<GradientStopCollection>
<GradientStop Offset="0" Color="Yellow"></GradientStop>
<GradientStop Offset="1" Color="Green"></GradientStop>
</GradientStopCollection>
</LinearGradientBrush>
</Border.Background>
<ContentPresenter RecognizesAccessKey="True" Margin="{TemplateBinding Padding}"></ContentPresenter>
<Border.Triggers>
<EventTrigger RoutedEvent="Border.MouseDown">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Button.Background).(SolidColorBrush.Color)">
<LinearColorKeyFrame KeyTime="00:00:00" Value="Red"></LinearColorKeyFrame>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Border.Triggers>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="bor" Property="Background" Value="Green"></Setter>
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter TargetName="bor" Property="Background" Value="Red"></Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Window.Resources>
<Button Margin="10" Width="130" Height="130" Template="{StaticResource TemplateB}">
<Button Margin="65,0,0,0" Width="65" Height="130" Template="{StaticResource TemplateA}"></Button>
</Button>
</Window>
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