big_vision/tools/lit_demo/src/components/loading-animation.scss

// CC0 from https://loading.io/css/

@import '../style/colors';

.lds-ellipsis {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;

  div {
    position: absolute;
    top: 33px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--text-fg);
    animation-timing-function: cubic-bezier(0, 1, 1, 0);
  }

  div:nth-child(1) {
    left: 8px;
    animation: lds-ellipsis1 0.6s infinite;
  }

  div:nth-child(2) {
    left: 8px;
    animation: lds-ellipsis2 0.6s infinite;
  }

  div:nth-child(3) {
    left: 32px;
    animation: lds-ellipsis2 0.6s infinite;
  }

  div:nth-child(4) {
    left: 56px;
    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(24px, 0);
  }
}