Image viewer

<div data-image-viewer class="env-image-viewer">
   <div>   
      <a class="env-image-viewer__images" href="//unsplash.it/800/800">
         <img src="https://unsplash.it/900/400/" class="env-image-viewer__img" alt="Image">
      </a>
   </div>
   <ol class="env-image-viewer__thumbnails">
      <li>
         <a class="env-image-viewer__images" href="//unsplash.it/800/800?blur">
            <img src="https://unsplash.it/200/100" class="env-image-viewer__thumbnail"
               alt="First thumbnail">
         </a>
      </li>
       <li>
         <a class="env-image-viewer__images" href="//unsplash.it/800/800/">
            <img src="https://unsplash.it/200/100?blur" class="env-image-viewer__thumbnail"
               alt="Second thumbnail">
         </a>
      </li>
   </ol>
</div>