#!/opt/perl-latest/bin/perl -w
use threads;
use threads::shared;
use strict;

my @scores : shared = (10,10);
my @ts;

for my $num (0 .. 1) {
    my $t =threads->new(sub { battle($num) } );
    push @ts,$t;
}

$_->join() for @ts;

sub battle {
    my $me = shift;
    my $other = $me ? 0 : 1;
    while ($scores[$me] > 0 && $scores[$other] > 0) {
        $scores[$other]--;
        print "Bot $me hit bot $other\n";
        select(undef,undef,undef,rand 0.1);
        threads->yield;
    }
    print "Bot $me ".($scores[$me] > 0 ? 'won' : 'lost')."\n";
}

##</code><code>##

-- 
Joost       downtime n. The period during which a system
            is error-free and immune from user input.