Select Code to Download

use strict;
use warnings;
...

    print "\n";
}

red-1 red-2 red-3 green-3 black-3 
red-4 red-5 red-6 green-6 black-6 
...
red-13 red-14 red-15 green-15 black-15 
red-16 red-17 red-18 green-18 black-18 
red-19 red-20