arcgis silverlight 查询实现点闪耀

<Grid.Resources>
            <esriSymbols:MarkerSymbol x:Name="DefaultMarkerSymbol">
                <esriSymbols:MarkerSymbol.ControlTemplate>
                    <ControlTemplate>
                        <Canvas>
                            <vsm:VisualStateManager.VisualStateGroups>
                                <vsm:VisualStateGroup x:Name="CommonStates">
                                    <vsm:VisualState x:Name="Normal">
                                        <Storyboard RepeatBehavior="Forever">

                                            <DoubleAnimation BeginTime="00:00:00" Storyboard.TargetName="ellipse" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)" From="1" To="10" Duration="00:00:01" />

                                            <DoubleAnimation BeginTime="0:0:0" Storyboard.TargetName="ellipse" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleY)" From="1" To="10" Duration="00:00:01" />

                                            <DoubleAnimation BeginTime="00:00:00" Storyboard.TargetName="ellipse" Storyboard.TargetProperty="(UIElement.Opacity)" From="1" To="0" Duration="00:00:01" />
                                        </Storyboard>
                                    </vsm:VisualState>

                                </vsm:VisualStateGroup>
                            </vsm:VisualStateManager.VisualStateGroups>
                            <Ellipse Height="10" Width="10" Canvas.Left="-5" Canvas.Top="-5" RenderTransformOrigin="0.5,0.5" x:Name="ellipse" IsHitTestVisible="False">
                                <Ellipse.RenderTransform>
                                    <ScaleTransform />
                                </Ellipse.RenderTransform>
                                <Ellipse.Fill>
                                    <RadialGradientBrush>
                                        <GradientStop Color="#00FF0000" />
                                        <GradientStop Color="#FFFF0000" Offset="0.25" />
                                        <GradientStop Color="#00FF0000" Offset="0.5" />
                                        <GradientStop Color="#FFFF0000" Offset="0.75" />
                                        <GradientStop Color="#00FF0000" Offset="1" />
                                    </RadialGradientBrush>
                                </Ellipse.Fill>
                            </Ellipse>
                            <Ellipse Height="10" Width="10" Canvas.Left="-5" Canvas.Top="-5" Fill="#FFFF0000" x:Name="ellipse1" />
                        </Canvas>
                    </ControlTemplate>
                </esriSymbols:MarkerSymbol.ControlTemplate>
            </esriSymbols:MarkerSymbol>
            <!--<esriSymbols:PictureMarkerSymbol x:Name="DefaultMarkerSymbol"
                OffsetX="0" OffsetY="31" Source="img/draw.png" />-->
            <esriConverters:DictionaryConverter x:Name="MyDictionaryConverter" />
        </Grid.Resources>