Making a simple module is not difficult and does not require you to learn O-O programming or anything other than a basic formula. For a module with just the function 'foo' create Foo.pm with the following:

package   Foo;
require   Exporter;
@ISA      =qw(Exporter);
@EXPORT   =qw(foo); # List funcs to export here
sub foo($){
   print @_;
}
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To use it:

use Foo;
foo("Hello\n");
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--traveler