 height: 100%;
      border-radius: 50%;
      background-color: #333;
      opacity: 0.6;
      position: absolute;
      top: 0;
      left: 0;

      -webkit-animation: sk-bounce 2.0s infinite ease-in-out;
      animation: sk-bounce 2.0s infinite ease-in-out;
    }

    .double-bounce2 {
      -webkit-animation-delay: -1.0s;
      animation-delay: -1.0s;
    }

    @-webkit-keyframes sk-bounce {
      0%,
      100% {
        -webkit-transform: scale(0.0)
      }
      50% {
        -webkit-transform: sc