displaying objects on canvas with delay

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WPF

Hi!

Please help me, I am newcomer in WPF. I first created two ellipse objects using code:
//first ellipse object
Ellipse myElp1=new Ellipse;
myElp1.Width=10;
myElp1.Height=10;
myElp1.Fill=Brushes.Blue;

//second ellipse object
Ellipse myElp2=new Ellipse;
myElp2.Width=10;
myElp2.Height=10;
myElp2.Fill=Brushes.Blue;

Now, i placed these two objects on canvas with id/name myCanvas at different positions using:

TranslateTransform mytransform=new TranslateTransform(100,100);
myElp1.RenderTransform=mytransform;
myCanvas.Children.Add(myElp1);

//now, place second ellipse

//delay(1000); //for delaying

TranslateTransform mytransform=new TranslateTransform(200,200);
myElp1.RenderTransform=mytransform;
myCanvas.Children.Add(myElp2);

It works good....Now i want that the second ellipse object appear on canvas after one second delay. For this, uncomment delay()method in above code. Its definition is as:

void delay(double ms)
{
DateTime m=DateTime.Now.AddMilliseconds(ms);
do
{
;
}
while(DateTime.Now<=m)
}

but i am failed to achieve the required result...I was supposing that the second ellipse will appear on the screen after one second but failed to achieve this..my screen waited for one second and then it display two ellipse simultaneously. If i use MessageBox()instead of delay method it works good but i dont want MessageBox that prompt the user to clik so that my program display second ellipse.