$ cat Ownmodule.pm
# -*- Perl -*-

use strict;
use warnings;

package Ownmodule;
use base 'Exporter';
our @EXPORT=qw/first/;

sub first {
    print "<first> called\n";
    second();
}

sub second {
    print "<second> called\n";
}

1;


__END__
$ perl -MOwnmodule -e first
<first> called
<second> called