.busy-spinner {
  position: fixed;
  display: inline-block;
  width: 80px;
  height: 80px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.busy-spinner:after {
  content: ' ';
  display: block;
  width: 64px;
  height: 64px;
  margin: 8px;
  border-radius: 50%;
  border: 6px solid rgb(221, 220, 220);
  border-color: rgb(221, 220, 220) transparent rgb(221, 220, 220) transparent;
  animation: busy-spinner 0.5s linear infinite;
}

@keyframes busy-spinner {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}