write('Welcome to Pro-Lisp!'),nl,\r
write('This is a miniscule Lisp interpreter, written in Prolog'),nl,\r
prompt(Old, '> '),\r
write('Welcome to Pro-Lisp!'),nl,\r
write('This is a miniscule Lisp interpreter, written in Prolog'),nl,\r
prompt(Old, '> '),\r