#!/usr/bin/perl
use strict;
use warnings;
use Term::ProgressBar 2.00;
use constant MAX => 1_000_000;
my $max = int($ARGV[0] || MAX);
my $progress = Term::ProgressBar->new({
        name => 'Powers',
        count => $max,
        ETA => 'linear',
});
#$progress->minor(0);
my $next_update = 0;
for (0..$max) {
  my $is_power = 0;
  for(my $i = 0; 2**$i <= $_; $i++) {
    $is_power = 1
      if 2**$i == $_;
  }
sleep 1
if $_ % 4 == 0;
  $next_update = $progress->update($_)
    if $_ > $next_update;
}
$progress->update($max)
    if $max >= $next_update;