why don't (doesn't) this work?

folio hackery

  	<div class="indent">
			<?php include_once('homepage-gallery.php')
			$id = '222';
			$existing_attachments  = attachments_get_attachments($id);					
			if( is_array($existing_attachments) && !empty($existing_attachments) )	{
			$attachment_index = 0;
			echo '<ul>';
			foreach ($existing_attachments as $attachment) 	{
			$attachment_index++; 
			?>
			<li><?php echo wp_get_attachment_image( $attachment['id'], array(355, 160), 1 ); ?></li>
			<?php }}?>
			<?php echo '</ul>'; ?>
		</div>

this is what's causing the infinite loop on the home page. WTF?

It's undefined. I'm vague on what needs to be written to make it defined.