.lds-dual-ring {
  display: inline-block;
  width: 30px;
  height: 28px;
}

.lds-dual-ring:after {
  content: "";
  display: block;
  width: 25px;
  height: 25px;
  border-radius: 100%;
  border: 3px solid black;
  border-color: black transparent black transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}