Agora-client/template/comps/loader.html

<style media="screen">
  canvas {
    display: block;
    vertical-align: bottom;
  }

  @keyframes blink {
    0% {
      opacity: 1;
      text-shadow:0 0 1px white;
      }
    50% {
      opacity: 0;
      text-shadow:0 0 10px white;
      }
    100% {
      opacity: 1;
      text-shadow:0 0 1px white;
      }
  }
  .blink {
    position: relative;
    text-align: center;
    text-transform: uppercase;
    font-family: 'Open Sans', sans-serif;
    font-weight: bold;
    color: white;
    top: 40vh;
    width: 100%;
    z-index: 1;
    animation: blink 2s infinite;
  }

  @keyframes rotation {
    from {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=0);
    }
    to {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=10);
    }
  }
  #particles {
    overflow: hidden;
    width: 100vmax;
    height: 100vmax;
    animation: rotation 20s infinite;
    margin-top: -70vh;
  }

  .loader {
    overflow: hidden;
    position: absolute;
    top: 0;
    width: 99%;
    height: 99%;
  }
</style>

<div class="loader">
  <h2 class="blink">{{loading}}</h2>
  <div id="particles"></div>
</div>