Below is a sample code snippet that demonstrates how to create a simple animation in XAML and Silverlight

Creating an Animation in XAML and Silverlight

<Grid x:Name="LayoutRoot" Background="White">

<Canvas x:Name="ACCanvas" xmlns="http://schemas.microsoft.com/client/2007"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Width="400" Height="300" >

<Canvas.Background>

<SolidColorBrush Color="Yellow"/>

</Canvas.Background>

<Rectangle Width="190" Height="160"

Fill="Red" Stroke="Green"

Canvas.Left="0" Canvas.Top="50" RenderTransformOrigin="0,0" >

<Rectangle.RenderTransform>

<TransformGroup>

<RotateTransform x:Name="RotateTransform"

Angle="0"/>

<ScaleTransform x:Name="ScaleTransform"

ScaleX="0" ScaleY="0" />

</TransformGroup>

</Rectangle.RenderTransform>

</Rectangle>

</Canvas>

<Grid.Triggers>

<EventTrigger RoutedEvent="Grid.Loaded">

<BeginStoryboard>

<Storyboard AutoReverse="True" RepeatBehavior="Forever">

<DoubleAnimation

Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleX" From="0" To="1" Duration="0:0:3"/>

<DoubleAnimation Storyboard.TargetName="ScaleTransform" Storyboard.TargetProperty="ScaleY" From="0" To="1" Duration="0:0:3"/>
</Storyboard>

</BeginStoryboard>

</EventTrigger>

</Grid.Triggers>

</Grid>