#!/usr/bin/perl
use strict;
use warnings;

use constant AWHILE => 1;

my $life = new Life;

until ($@) {
    eval { !$life->fulfilled ? sleep(AWHILE) && $life->tick : die('happy') }
}
print $life->fullfilled if $@ =~ /happy/;

#_____________________________________________________________________
package Life;

sub new { 
    my ($existance, $self) = (shift,{age=>0, maxage=>int(rand(100))});
    bless $self, $existance; 
}

sub fulfilled {
    $ENV{ENLIGHTENMENT}
}

sub tick {
    no warnings 'once';
    seek ENLIGHTENMENT, 0, 1;
    $_[0]->{age}++;
    die( $_[0]->{age} ) if (($_[0]->{age}) > ($_[0]->{maxage}))
}