Event loop for frontpage

<?php
            global $post;
            $all_events = tribe_get_events( array(
                'posts_per_page'=>3
            )   );

        foreach($all_events as $post) {
            setup_postdata($post);
        ?>

            <?php
            $image_id = get_post_thumbnail_id();
            $image_url = wp_get_attachment_image_src($image_id,'large');
            $image_url = $image_url[0];
            ?>
                        <article class="threecol" style="background: silver url('<?php echo $image_url ?>') center center no-repeat; background-size: cover">

                <div class="meta">
                                        <!--what-->
                                        <? tribe_meta_event_cats($args); ?>
                                        <? //echo tribe_get_event_categories(); ?>
                                   <span class="when">
                                   <?php echo tribe_get_start_date($post->ID, false, 'j F Y H:i'); ?>
                                     </span>
                                     <h1><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h1>

                  </div>

            </article>

        <?php } //endforeach ?>
        <?php wp_reset_query(); ?>