private void drawPictureOnPicture(
       Picture source,Picture dest,int xOff,
                                  int yOff){

      Graphics destGraphics = 
                         dest.getGraphics();
      Image sourceImage = source.getImage();
      destGraphics.drawImage(sourceImage,
                             xOff,
                             yOff,
                             null);
  }//end drawPictureOnPicture method