Galeria (carrousel) o Thumbnail

<figure class="small-12 medium-6 cell">
					<?php if( get_field('galeria') ): ?>
					<?php $images = get_field('galeria'); if( $images ): ?>
					    <div class="owl-carousel owl-theme">
					        <?php foreach( $images as $image ): ?>
					            <div class="item">
					                 <img src="<?php echo $image['sizes']['medium_thumb']; ?>" alt="<?php echo $image['alt']; ?>" />
					            </div>
					        <?php endforeach; ?>
					    </div>
					<?php endif; ?>
					<?php else : ?>
					<?php if ( has_post_thumbnail() ) { the_post_thumbnail('medium_thumb'); } ?>
					<?php endif; ?>
					</figure>