I suggest that you take a look at
The Very
Very Short Tutorial About Modules. It has an extremely
simple example of a module---the complete code, including
the module and the program that uses it, is only
nine lines long. There are also a set of exercises which
you can do or ignore. Probably looking at the example
module and running the program will be enough of an example
for you to do the same thing to your own functions.
--
Mark Dominus
Perl Paraphernalia