.spinner {
    display: inline-block;
    width: 64px;
    height: 64px;
    position: absolute;
    bottom:20px;
    left:50%;
    margin-left: -32px;
    margin-top: -32px;
  }
  .spinner div {
    position: absolute;
    top: 27px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #f44336;
    animation-timing-function: cubic-bezier(0, 1, 1, 0);
  }
  .spinner div:nth-child(1) {
    left: 6px;
    animation: lds-ellipsis1 0.6s infinite;
  }
  .spinner div:nth-child(2) {
    left: 6px;
    animation: lds-ellipsis2 0.6s infinite;
  }
  .spinner div:nth-child(3) {
    left: 26px;
    animation: lds-ellipsis2 0.6s infinite;
  }
  .spinner div:nth-child(4) {
    left: 45px;
    animation: lds-ellipsis3 0.6s infinite;
  }
  @keyframes lds-ellipsis1 {
    0% {
      transform: scale(0);
    }
    100% {
      transform: scale(1);
    }
  }
  @keyframes lds-ellipsis3 {
    0% {
      transform: scale(1);
    }
    100% {
      transform: scale(0);
    }
  }
  @keyframes lds-ellipsis2 {
    0% {
      transform: translate(0, 0);
    }
    100% {
      transform: translate(19px, 0);
    }
  }