do you want the window to come out at you or recede? ditto for the sashes. that would affect how flat one space would be--more quilting, flatter, recede. Or do a golfing design in the windows and parallel to the length (make sense?) lines in the sashes, starting with a SITD, then about thirds over the sashes. Or just an overall pattern to help you get it done faster. Depends on how many stops/starts. so, was that at all helpful? or just rambles from a Saturday spent not quilting enough?