just an loading

by Outrora

HTML

<div class="loading"></div>

CSS

.loading {
  width: 2px;
  height: 20px;
  background: green;
  animation-name: loading;
  animation-duration: 0.2s;
  animation-iteration-count: infinite;
  animation-fill-mode: forwards;
  animation-timing-function: linear;
  animation-delay: 0s;
  transform: rotate(0deg);
  display: inline-block;
}
@keyframes loading {
  from { transform: rotate(0deg); }
  to { transform: rotate(180deg); }
}