<div class="d-flex flex-xxl-wrap-reverse bg-secondary p-1" style="width: 100px;">
<div class="p-3 bg-info">1</div>
<div class="p-3 bg-warning">2</div>
<div class="p-3 bg-primary">3</div>
<div class="p-3 bg-success">4</div>
</div>
You don't need to remember all CSS classes. Just use the Bootstrap Editor instead.