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

body {
  background: #262526;
}

.loading {
  width: 30px;
  height: 30px;
  border: 5px solid #ccc;
  position: fixed;
  left: 50%;
  margin-left: -20px;
  top: 50%;
  margin-top: -20px;
  border-radius: 50%;
}


.loading:after {
  content: '';
  position: absolute;
  width: 40px;
  height: 10px;
  background: #262526;
  top: 10px;
  left: -5px;
  animation: spin 1.2s infinite;
}

@keyframes spin {
  100% {
    transform: rotate(360deg);
  }
}