$args = array(
    'posts_per_page' => 5,
    'order' => 'DESC',
    'orderby' => 'rand',
);

$query = new WP_Query( $args );

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
        $query->the_post();
        the_title( '', '<br>' );
    }
} else {
    echo esc_html( 'Yazı bulunamadı :(' )
}

wp_reset_postdata();