##### Whirley package
package Whirley;
use strict;
my @whirlies = qw!. o 0 O 0 o!;
my $current  = -1;

sub TIESCALAR {
  my $type  = shift;
  my $class = ref $type || $type;
  my $self = {};
  bless $self, $class;
}

sub FETCH {
  my $self = shift;
  my $backspace = $current < 0 ? '' : "\b"; # don't backspace on first
+ go 'round
  $current = 0 if (++$current == @whirlies);
  return $backspace . $whirlies[$current];
}

##### Main package
package Main;
use strict;
$|++;

my $whirley;
tie $whirley, 'Whirley';

print "Please wait: ";
while (1) {
  print $whirley;
  sleep 1;
}
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