.lds-facebook {
  display: inline-block;
  position: relative;
  width: 25px;
  height: 10px;
  margin: 0 auto;
}
.lds-facebook div {
  display: inline-block;
  position: absolute;
  left: 2px;
  width: 5px;
  background: #453c5c;
  animation: lds-facebook 1s cubic-bezier(0, 0.3, 0.6, 1) infinite;
}
.lds-facebook div:nth-child(1) {
  left: 2px;
  animation-delay: -0.24s;
}
.lds-facebook div:nth-child(2) {
  left: 10px;
  animation-delay: -0.12s;
}
.lds-facebook div:nth-child(3) {
  left: 18px;
  animation-delay: 0;
}
@keyframes lds-facebook {
  0% {
    top: 8px;
    height: 8px;
  }
  100%,
  50% {
    top: 16px;
    height: 16px;
  }
}