Wordpress: wrap 3 and 3 posts

gistfile1

<?php
if(have_posts()) : for($count=0;have_posts();$count++) : the_post();
    $open = !($count%3) ? '<div class="threeacross">' : ''; //Create open wrapper if count is divisible by 3
    $close = !($count%3) && $count ? '</div>' : ''; //Close the previous wrapper if count is divisible by 3 and greater than 0
    echo $close.$open;
?>

					

<?php // do stuff ?>


					
<?php endfor; else : ?>
<h1>Not found.</h1>
<?php endif; ?>
<?php echo $count ? '</div>' : ''; //Close the last wrapper if post count is greater than 0 ?>