circle = mystand.addCircle( 0, 25, 5)
mystand.setDistance( circle.centerData(), thisxmin, 10 )
mystand.setDistance( circle.centerData(), thiszmax, 10 )
circle = mystand.addCircle( 0, 25, 5)
mystand.setDistance( circle.centerData(), thisxmin, 10 )
mystand.setDistance( circle.centerData(), thiszmax, 10 )