CODE EXAMPLE FOR CSS

generate random grid in css

<ul class="wrapper">
   <li><img src="https://placehold.it/200x300" alt="placeholder"></li>
   <li class="landscape"><img src="https://placehold.it/350x200" alt="placeholder"></li>
   <li class="landscape"><img src="https://placehold.it/350x200" alt="placeholder"></li>
   <li class="landscape"><img src="https://placehold.it/350x200" alt="placeholder"></li>
   <li><img src="https://placehold.it/200x300" alt="placeholder"></li>
   <li><img src="https://placehold.it/200x300" alt="placeholder"></li>
   <li class="landscape"><img src="https://placehold.it/350x200" alt="placeholder"></li>
   <li><img src="https://placehold.it/200x300" alt="placeholder"></li>
   <li><img src="https://placehold.it/200x300" alt="placeholder"></li>
   <li><img src="https://placehold.it/200x300" alt="placeholder"></li>
</ul>