<div class="d-flex flex-wrap justify-content-xxl-center bg-secondary" style="height: 50px;">
<div class="px-4 bg-primary"></div>
<div class="px-4 bg-info"></div>
<div class="px-4 bg-primary"></div>
<div class="px-4 bg-info"></div>
<div class="px-4 bg-primary"></div>
<div class="px-4 bg-info"></div>
</div>
You don't need to remember all CSS classes. Just use the Bootstrap Editor instead.