>P.S. The Lisp "DO" form is for iteration; PROGN and BEGIN are the main block-structure forms used in Common Lisp and Scheme respectively. I think mst's using

>P.S. The Lisp "DO" form is for iteration; PROGN and BEGIN are the main block-structure forms used in Common Lisp and Scheme respectively. I think mst's using Arc's do, which is progn.