如何在WPF中模拟悬挂电缆？

public class HangingCable : Canvas
{
    private Path _cablePath;
    private DoubleAnimationUsingKeyFrames _animation;

    public HangingCable()
    {
        _cablePath = new Path
        {
            Stroke = Brushes.Black,
            StrokeThickness = 3,
            Data = new EllipseGeometry(new Point(0, 0), 5, 5)
        };
        Children.Add(_cablePath);

        _animation = new DoubleAnimationUsingKeyFrames
        {
            RepeatBehavior = RepeatBehavior.Forever
        };
        _animation.KeyFrames.Add(new LinearDoubleKeyFrame(0, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0))));
        _animation.KeyFrames.Add(new LinearDoubleKeyFrame(100, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(5))));
        _cablePath.BeginAnimation(Canvas.TopProperty, _animation);
    }
}

    <Grid>
       <local:HangingCable Width="200" Height="200" />
    </Grid>
</Window>