WPF - Styling the progress bar removes it's cycling abilities

Question

As I try to change the progress bar colors, it now displays the background color when progress bar is in cycle mode

an image of the applied style will be better than any explanation

as I apply this style, the progress bar does not cycle anymore, it is filled with the same color

<Style TargetType="{x:Type ProgressBar}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ProgressBar}">
                <Grid x:Name="TemplateRoot" SnapsToDevicePixels="true">
                    <Rectangle x:Name="PART_Track" 
                               Fill="{DynamicResource MyDimmedBrush}" />
                    <Rectangle x:Name="PART_Indicator"
                               HorizontalAlignment="Left" 
                               Fill="{DynamicResource MyBrush}"
                               Margin="{TemplateBinding Padding}" />
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

thanks for your help

Answer 1

Apparently it is as simple as this

<Style TargetType="{x:Type ProgressBar}">
    <Setter Property="Background" Value="blue" />
    <Setter Property="Foreground" Value="red" />
</Style>