if($roll_your_own == 1){ 
        system('a_different_script.pl');
}else{ 
    go_at_it_yourself();
}



##</code><code>##

 

if($roll_your_own == 1){ 
 
require RollYourOwn
RollYourOwn::rollit($do_this)
}else{ 
    go_at_it_yourself();
}