Show Posts in last 3 days

This code in your loop will print ‘this post is within my date limit’ if the post date is within the last 3 days:

<?php
$mylimit= 3 * 86400; //days * seconds per day
$post_age = date('U') - get_post_time('U');
if ($post_age <= $mylimit) {
echo 'this post is within my date limit ';
}
?>

<div id="container">
<div id="main-col">
<h3 class="blog-title"><a href="<?php echo get_option('home'); ?>/"><em><?php bloginfo('name'); ?></em></a></h3>
<span class="logo-spacer"></span>
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
	<div class="post" id="post-<?php the_ID(); ?>">
    	<h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h2>
        <div class="date"><span class="year"><?php the_time('Y') ?></span> <?php the_time('F') ?> <span class="day"><?php the_time('jS') ?></span></div>
        <div class="comments"><span class="comment-count"><?php comments_popup_link('0', '1', '%'); ?></span> Comments</div>
        <br clear="all" />
        <div class="excerpt"><?php the_content('Read the rest of this entry &raquo;'); ?></div>
    </div>
    <div class="filed">Filed under <?php the_category(', ') ?> by <?php the_author() ?> on <?php the_time('F jS, Y') ?> @ <?php the_time() ?> </div>
    <span class="spacer"></span>
<?php endwhile; else: ?>
<p><?php _e('Sorry, no posts matched your criteria.'); ?></p>
<?php endif; ?>
    </div>

So if this is my loop on home.php – then the code goes where?

bump^^?

Double bump?^^