$screencategory_id , 'posts_per_page' => -1 );
$query = new WP_Query($args);
if($query->have_posts()):
while($query->have_posts()):
$query->the_post();
if(has_post_thumbnail()){
$image_id = get_post_thumbnail_id();
$image_url = wp_get_attachment_image_src( $image_id,'',true );
?>