reverse if(!empty($customField))

How would you reverse this? so if the custom field is empty show posts

<?php

           $newquery = new WP_Query();  

           $newquery->query('post_type=log');  

           while($newquery->have_posts()) : $newquery->the_post();  

		   $customField = get_post_custom_values('complete');

		   if(!empty($customField)) {

          ?>