This seems like the easiest way - but will it still send GCode if there is no laser connected to the computer? (I just realized that would be an issue!)
That would also let me taylor the outline shape I’m making so if I’m working with an irregular shape like this:

That way if I want to take advantage of the added height in the middle, the outline will show me how the shape fits into the material.
Is there an easy way to make the CNC repeat the shape until I hit “Stop?”