Hello,
Welcome to Scilab discourse !
As a new user you may (or may not, apparently) have read the forum guidelines (see Welcome to the Scilab discourse forum!), hence your message can be quite confusing for people who will try to help you: I mean, pasting a bunch of code without even saying “hello” is not very engaging.
Since the author of this code is a real person, why don’t you try to contact him directly? If you don’t succeed in that first step, we can help you if you focus more your question.
S.