I'm trying to make a simple countdown timer to display at a console window (using 'sleep'), but the code below does something quite different from what I expect. I'm a Perl newbie (kinda) so I don't know if I must turn on some environmental variable to make it behave like I want. 
#!/usr/bin/perl
use warnings;
use strict;

sub countdown {
    my $int = $_[0];
    while ($int > 0) {
        print "$int ... ";
        sleep 1;
        $int--;
    }
    print "\n";
}

sub main {
    print "something happens in ";
    countdown (3);
}

&main;

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In reply to Trying to make a simple countdown timer by maxamillionk

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