WordPress: Modulo example to create rows

gistfile1.php

<?php
	global $post;
	$args = array(
		'post_type' => 'post',
		'posts_per_page' => -1
	);
	$new_query = new WP_Query($args);
	$post_count = 0;
	$total_posts = $new_query->post_count;
?>
<?php while( $new_query->have_posts() ) : $new_query->the_post(); ?>
<?php $post_count++ ?>
<?php if ($post_count % 3 == 1) : ?>
<div class="row-fluid">
<?php endif; ?>
	<div class="span4">

	</div>
<?php if ( $post_count % 3 == 0  || $post_count == $total_posts ) : ?>
</div>
<?php endif; ?>
<?php endwhile; ?>
<?php wp_reset_postdata(); ?>