.lds-hourglass {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20000;
  }
  .lds-hourglass:after {
    content: " ";
    display: block;
    border-radius: 50%;
    width: 0;
    height: 0;
    margin: 8px;
    box-sizing: border-box;
    border: 35px solid #fff;
    border-color: #fff transparent #fff transparent;
    animation: lds-hourglass 1.2s infinite;
  }
  @keyframes lds-hourglass {
    0% {
      transform: rotate(0);
      animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    }
    50% {
      transform: rotate(900deg);
      animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    }
    100% {
      transform: rotate(1800deg);
    }
  }