<?php
		if(have_posts()):

			while(have_posts()): the_post(); $meta = get_post_meta(get_the_id()); global $post;

			if( has_post_thumbnail() ) {

				$hero_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'hero' );

				$hero = 'style="background-image: url('.$hero_url[0].');"';

			}
			?>