ng-pokemon-app/src/app/pokemon/loader/loader.component.html

<div class="preloader-wrapper big active">
  <div class="spinner-layer spinner-blue">
    <div class="circle-clipper left">
      <div class="circle"></div>
    </div>
    <div class="gap-patch">
      <div class="circle"></div>
    </div>
    <div class="circle-clipper right">
      <div class="circle"></div>
    </div>
  </div>
</div>