Cacher is the code snippet organizer for pro developers

 <?php 
        $args = array(
            'posts_per_page' => 4,
            'orderby' => 'rand',
            'category_name' => 'group_trainings'
        );
                                    
        $query = new WP_Query( $args );
        // The Loop
        if ( $query->have_posts() ) {
        
            while ( $query->have_posts() ) {
                 echo '<div>';
                $query->the_post();
                $more = 0;
                echo '<a href="' . get_permalink() . '" title="Learn more about ' . get_the_title() . '">';
                echo '<figure class="testimonial-thumb">';
                the_post_thumbnail('testimonial-mug');
                echo '</figure>';
                echo '<aside class="testimonial-text">';
                echo '<h3 class="testimonial-name">' . get_the_title() . '</h3>';
                echo '<div class="testimonial-excerpt">';
                the_content('');
                echo '</div>';
                echo '</aside>';
                echo '</a>';
                echo '</div>';
            }
           
        }
        /* Restore original Post Data */
        wp_reset_postdata();
        ?>