.z-circle {
    width: 22px;
    height: 22px;
    position: relative;
    margin: 10px auto;
  }
  
  .z-circle > div {
    background-color: initial;
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
  }
  
  .z-circle > div::before {
    content: '';
    display: block;
    margin: 0 auto;
    width: 20%;
    height: 20%;
    background-color: currentColor;
    border-radius: 100%;
  
    -webkit-animation: z-bouncedelay 1.2s infinite ease-in-out;
    animation: z-bouncedelay 1.2s infinite ease-in-out;
    /* Prevent first frame from flickering when animation starts */
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
  }
  
  .z-circle > div:nth-child(2)  { -webkit-transform: rotate(30deg);  transform: rotate(30deg)  }
  .z-circle > div:nth-child(3)  { -webkit-transform: rotate(60deg);  transform: rotate(60deg)  }
  .z-circle > div:nth-child(4)  { -webkit-transform: rotate(90deg);  transform: rotate(90deg)  }
  .z-circle > div:nth-child(5)  { -webkit-transform: rotate(120deg); transform: rotate(120deg) }
  .z-circle > div:nth-child(6)  { -webkit-transform: rotate(150deg); transform: rotate(150deg) }
  .z-circle > div:nth-child(7)  { -webkit-transform: rotate(180deg); transform: rotate(180deg) }
  .z-circle > div:nth-child(8)  { -webkit-transform: rotate(210deg); transform: rotate(210deg) }
  .z-circle > div:nth-child(9)  { -webkit-transform: rotate(240deg); transform: rotate(240deg) }
  .z-circle > div:nth-child(10) { -webkit-transform: rotate(270deg); transform: rotate(270deg) }
  .z-circle > div:nth-child(11) { -webkit-transform: rotate(300deg); transform: rotate(300deg) }
  .z-circle > div:nth-child(12) { -webkit-transform: rotate(330deg); transform: rotate(330deg) }
  
  .z-circle > div:nth-child(2)::before  { -webkit-animation-delay: -1.1s; animation-delay: -1.1s }
  .z-circle > div:nth-child(3)::before  { -webkit-animation-delay: -1.0s; animation-delay: -1.0s }
  .z-circle > div:nth-child(4)::before  { -webkit-animation-delay: -0.9s; animation-delay: -0.9s }
  .z-circle > div:nth-child(5)::before  { -webkit-animation-delay: -0.8s; animation-delay: -0.8s }
  .z-circle > div:nth-child(6)::before  { -webkit-animation-delay: -0.7s; animation-delay: -0.7s }
  .z-circle > div:nth-child(7)::before  { -webkit-animation-delay: -0.6s; animation-delay: -0.6s }
  .z-circle > div:nth-child(8)::before  { -webkit-animation-delay: -0.5s; animation-delay: -0.5s }
  .z-circle > div:nth-child(9)::before  { -webkit-animation-delay: -0.4s; animation-delay: -0.4s }
  .z-circle > div:nth-child(10)::before { -webkit-animation-delay: -0.3s; animation-delay: -0.3s }
  .z-circle > div:nth-child(11)::before { -webkit-animation-delay: -0.2s; animation-delay: -0.2s }
  .z-circle > div:nth-child(12)::before { -webkit-animation-delay: -0.1s; animation-delay: -0.1s }
  
  @-webkit-keyframes z-bouncedelay {
    0%, 80%, 100% { -webkit-transform: scale(0.0) }
    40% { -webkit-transform: scale(1.0) }
  }
  
  @keyframes z-bouncedelay {
    0%, 80%, 100% {
      -webkit-transform: scale(0.0);
      transform: scale(0.0);
    } 40% {
      -webkit-transform: scale(1.0);
      transform: scale(1.0);
    }
  }