'post',
'post_status' => 'publish',
'category_name' => get_theme_mod( 'set-news-categories' ),
'orderby' => 'desc',
'posts_per_page' => 3
);
$query = new WP_Query( $args );
if ( $query->have_posts() ):
while ( $query->have_posts() ) : $query->the_post();
?>