I understand what you're saying. My hypothesis is that (some version of) Lisp itself, being a tree, could be interesting to visually edit. All my code, by the

I understand what you're saying. My hypothesis is that (some version of) Lisp itself, being a tree, could be interesting to visually edit. All my code, by the way, can be directly accessed from Racket (and vice-versa), so it's definitely not a requirement that the whole program be written graphically. I want to make it a smooth transition from textual to graphical programming.