accounts-frontend/packages/app/components/ui/loader/loader.html

<div id="loader" class="loader-overlay is-first-launch">
  <div class="loader">
    <div class="loader__cube loader__cube--1"></div>
    <div class="loader__cube loader__cube--2"></div>
    <div class="loader__cube loader__cube--3"></div>
    <div class="loader__cube loader__cube--4"></div>
    <div class="loader__cube loader__cube--5"></div>
    <div class="loader__cube loader__cube--6"></div>
    <div class="loader__cube loader__cube--7"></div>
    <div class="loader__cube loader__cube--8"></div>
  </div>
</div>