WPF 图片跑马灯

public void OnFlushImage()
{
    bool bStart = false;
    while (mFlush == true)
    {
        if (bStart)
        {
            Thread.Sleep(1000);
            continue;
        }

        bStart = true;

        cloudTop.Dispatcher.BeginInvoke(
        new Action(() =>
        {
            Duration duration = new Duration(TimeSpan.FromMilliseconds(20000));  
            DoubleAnimation daRx = new DoubleAnimation();  
            daRx.Duration = duration;  
            daRx.To = 1300;
            daRx.RepeatBehavior = RepeatBehavior.Forever;

            cloudTop_tt.BeginAnimation(TranslateTransform.XProperty, daRx);
        }), null);

        Thread.Sleep(3000);

        cloudBottom.Dispatcher.BeginInvoke(
        new Action(() =>
        {
            Duration duration = new Duration(TimeSpan.FromMilliseconds(10000));
            DoubleAnimation daRx = new DoubleAnimation();
            daRx.Duration = duration;
            daRx.To = 1300;
            daRx.RepeatBehavior = RepeatBehavior.Forever;

            cloudBottom_tt.BeginAnimation(TranslateTransform.XProperty, daRx);
        }), null);
    }

    // Stop 
    cloudTop.Dispatcher.BeginInvoke(
        new Action(() =>
        {
            Duration duration = new Duration(TimeSpan.FromMilliseconds(400));
            DoubleAnimation daRx = new DoubleAnimation();
            daRx.Duration = duration;
            daRx.To = 1300;

            cloudTop_tt.BeginAnimation(TranslateTransform.XProperty, daRx);
        }), null);

    cloudBottom.Dispatcher.BeginInvoke(
    new Action(() =>
    {
        Duration duration = new Duration(TimeSpan.FromMilliseconds(400));
        DoubleAnimation daRx = new DoubleAnimation();
        daRx.Duration = duration;
        daRx.To = 1300;

        cloudBottom_tt.BeginAnimation(TranslateTransform.XProperty, daRx);
    }), null);

    Thread.Sleep(1000);

    // Origin 
    cloudTop.Dispatcher.BeginInvoke(
        new Action(() =>
        {
            Duration duration = new Duration(TimeSpan.FromMilliseconds(10));
            DoubleAnimation daRx = new DoubleAnimation();
            daRx.Duration = duration;
            daRx.To = 0;

            cloudTop_tt.BeginAnimation(TranslateTransform.XProperty, daRx);
        }), null);

    cloudBottom.Dispatcher.BeginInvoke(
    new Action(() =>
    {
        Duration duration = new Duration(TimeSpan.FromMilliseconds(10));
        DoubleAnimation daRx = new DoubleAnimation();
        daRx.Duration = duration;
        daRx.To = 0;

        cloudBottom_tt.BeginAnimation(TranslateTransform.XProperty, daRx);
    }), null);

    System.Diagnostics.Trace.WriteLine("Flush thread end.");            
}