Here's an update. Forgot to add an Error Line, so I used the mode line and added a new smaller mode line, and downsized the code window a hair. This image shows the X axis ref'd, and the Start button pushed, with code running. When stopped, the Start button goes back to blue.
I have to shrink the start buttons a bit. If you look closely, you can see the square corner of the button image overlapping the round corner of the border. What a pita.

They don't shrink well in Photoshop, so I'll have to make new ones. At least I only have to make one, then copy/paste and edit the text.
I might have these two screens done enough to run code with most of the functions working in a week or so. Then I'll upload it so you can play with it. It looks really cool when running. Blows away the last screen I made.