-- DesktopBackgroundScript.tioga

The desktop colors now tile properly; if "Foo.ais" is a bitmap AIS file (e.g., one created with PressScreen), say

_ &color _ ImagerColor.MakeSampledBlack[pa: ImagerPixelArray.FromAIS["Foo.ais"], um: ImagerTransformation.Scale[1], clear: FALSE]
_ ViewerPaintImpl.desktopGrey _ &color
_ ViewerOps.PaintEverything[]
    and your desktop will be less boring.  (You can use any Imager color, but this is a fast case.  There is another variable for the 
    color display).