The demo is purposely very simple. At the bottom of this page are examples which use the same erlbol.erl server, showing how a clickable list could be used.
The REBOL gui (erbol.r):
A little tweaking of the window area (erlbol_a.r):
Feedback coming to the server (erlbol.erl):
Error message: Note: the text is a misleading. If Erlang is not open or has crashed or if there is a problem with your REBOL code, then this screen comes up:
With just a few changes to the window code.
With list and button
Adding a new function (Reverse a string). See the Making Modifications page.