metamask-extension/ui/pages/swaps/mascot-background-animation/index.scss

.mascot-background-animation {
  display: flex;
  flex-flow: column;
  align-items: center;
  flex: 1;
  width: 100%;

  &__background-1,
  &__background-2 {
    width: 120px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    -webkit-animation: spin 38s linear infinite;
    -moz-animation: spin 38s linear infinite;
    animation: spin 38s linear infinite;

    @-moz-keyframes spin {
      100% {
        -moz-transform: rotate(360deg);
      }
    }

    @-webkit-keyframes spin {
      100% {
        -webkit-transform: rotate(360deg);
      }
    }

    @keyframes spin {
      100% {
        -webkit-transform: rotate(360deg);
        transform: rotate(360deg);
      }
    }
  }

  &__background-2 {
    width: 120px;
    height: 128px;
    -webkit-animation: spin 42s linear infinite;
    -moz-animation: spin 42s linear infinite;
    animation: spin 42s linear infinite;
  }

  &__mascot-container {
    position: relative;
  }

  &__animation {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    margin-top: 40px;
    margin-bottom: 40px;
  }
}