I made this using Vectric Cut2d Desktop to generate the dxf, then Sheetcam for CAM, starting with an image I found and edited. I've been cutting from a sheet of .090" mild steel and a 10"x10" piece of sheet is just big enough.
Creative Commons - Attribution
You may distribute, remix, tweak, and build upon this work, even commercially,
as long as you credit Mike M for the original creation.