What I meant was the Rect command parameters are LEFT, TOP, RIGHT, BOTTOM. I don't know what that means as relates to a Cartesian system.
After I wrote the above I stopped to go out on the patio to have a cigar with my wife. While there she asked me what I was working on and I explained my confusion. Let me say here that this is the same woman who has asked me this question for over thirty years and patiently listened to my explanations. The same one who, with no previous knowledge except my explanations of one theory or another decided to take her Novice then Technician class tests in amateur radio (in the days of morse code requirements) and passed both. She passed the code because she learned it helping me learn. So for this latest problem, I explained how the coordinate system worked and what the command syntax was. She thought for a minute, then explained how Rect was similar to Circle and that the Left , Top, Right, and Bottom appeared to be nothing more than displacements from X&Y: the equivalent of radius of a circle, but for a square. She wrote:
…and said, "Try that."
What do you know‼ I got a circle surrounded by a square.
Now if she'd just smoke her own cigars ….
(P.S. I made her buy her own copy of Mintoris Basic‼ I'll ask her next time before I clutter up your forum.)