my $tab = 0;

  html($tab, sub {
    $tab++;
    head($tab, sub {
      $tab++;
      title($tab, 'My page title');
      $tab--;
    });
    body($tab, sub {
      $tab++;
      div($tab, sub {
        $tab++;
        heading($tab, 1, 'My sample heading', { id => 'sample_heading', style => 'color:#666666' });
        $tab++;
        paragraph($tab, 'A sample paragraph so you can see how this works.');
        list($tab, \@list, { id => 'colors' });
        paragraph($tab, 'Another paragraph for you');
        $tab--;
        heading($tab, 1, 'A second sample heading');
        $tab--;
      }, { class => 'div_class' });
      paragraph($tab, 'Some end remarks.', { id => 'end_remarks', class => 'remarks' });
      $tab--;
    });
    $tab--;
  });