Nuxt/lib/app/views/loading/wandering-cubes.html

<style>
body, html, #<%= globals.id %> {
  background: <%= options.background %>;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
}

.spinner {
  width: 40px;
  height: 40px;
  position: relative;
}

.cube1, .cube2 {
  background-color: <%= options.color %>;
  width: 15px;
  height: 15px;
  position: absolute;
  top: 0;
  left: 0;

  -webkit-animation: sk-cubemove 1.8s infinite ease-in-out;
  animation: sk-cubemove 1.8s infinite ease-in-out;
}

.cube2 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

@-webkit-keyframes sk-cubemove {
  25% { -webkit-transform: translateX(42px) rotate(-90deg) scale(0.5) }
  50% { -webkit-transform: translateX(42px) translateY(42px) rotate(-180deg) }
  75% { -webkit-transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5) }
  100% { -webkit-transform: rotate(-360deg) }
}

@keyframes sk-cubemove {
  25% {
    transform: translateX(42px) rotate(-90deg) scale(0.5);
    -webkit-transform: translateX(42px) rotate(-90deg) scale(0.5);
  } 50% {
    transform: translateX(42px) translateY(42px) rotate(-179deg);
    -webkit-transform: translateX(42px) translateY(42px) rotate(-179deg);
  } 50.1% {
    transform: translateX(42px) translateY(42px) rotate(-180deg);
    -webkit-transform: translateX(42px) translateY(42px) rotate(-180deg);
  } 75% {
    transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5);
    -webkit-transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5);
  } 100% {
    transform: rotate(-360deg);
    -webkit-transform: rotate(-360deg);
  }
}
</style>

<div class="spinner">
  <div class="cube1"></div>
  <div class="cube2"></div>
</div>

<%= options.dev ? '<!-- http://tobiasahlin.com/spinkit -->' : '' %>