sub do_something {
        print "now we want to do this.\n";
        step_1();
        step_2();
        step_3();
    }
    
    sub step_1 {
        print "  handle this part of the job.\n";
    }

    sub step_2 {
        print "  handle the next part of the job.\n";
    }

    sub step_3 {
        print "  handle some other part of the job.\n";
    }

    do_something();