generator-steroids/generators/data-module/templates/views/__spinner.html

Yeoman generator

<style>
.spinner-box {
    height: 100%;
    min-height:400px;
    display: -webkit-box;
    -webkit-box-orient:vertical;
    -webkit-box-pack: center;
    -webkit-box-align: center;
    background-color: rgba(255,255,255,60);
  }
  .super-loading-c {
    font-size: 50px;
  }
</style>

<div class="spinner-box">
  <p>Working...</p>
  <i class="super-loading-c"></i>
</div>