Get windows and door coordination

A screenshot of this would be useful, at best in a new topic with a correct title…

Sorry. I didn’t see the response to this thread. My question was how was the closed polycurve created from the corner points of the door ? I’m consistently getting a “points are coincident” error. But my points are graphically not appearing to be coincident, just like in this example.
See this screenshot.

How did you achieve this?