/*
 *  Usage:
 *
      <div class="sk-fading-circle">
        <div class="sk-circle1 sk-circle"></div>
        <div class="sk-circle2 sk-circle"></div>
        <div class="sk-circle3 sk-circle"></div>
        <div class="sk-circle4 sk-circle"></div>
        <div class="sk-circle5 sk-circle"></div>
        <div class="sk-circle6 sk-circle"></div>
        <div class="sk-circle7 sk-circle"></div>
        <div class="sk-circle8 sk-circle"></div>
        <div class="sk-circle9 sk-circle"></div>
        <div class="sk-circle10 sk-circle"></div>
        <div class="sk-circle11 sk-circle"></div>
        <div class="sk-circle12 sk-circle"></div>
      </div>
 *
 */
 .sk-fading-circle {
    margin: 40px auto;
    width: 40px;
    height: 40px;
    position: relative; }
    .sk-fading-circle .sk-circle {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0; }
    .sk-fading-circle .sk-circle:before {
      content: '';
      display: block;
      margin: 0 auto;
      width: 15%;
      height: 15%;
      background-color: #333;
      border-radius: 100%;
      -webkit-animation: sk-circleFadeDelay 1.2s infinite ease-in-out both;
              animation: sk-circleFadeDelay 1.2s infinite ease-in-out both; }
    .sk-fading-circle .sk-circle2 {
      -webkit-transform: rotate(30deg);
          -ms-transform: rotate(30deg);
              transform: rotate(30deg); }
    .sk-fading-circle .sk-circle3 {
      -webkit-transform: rotate(60deg);
          -ms-transform: rotate(60deg);
              transform: rotate(60deg); }
    .sk-fading-circle .sk-circle4 {
      -webkit-transform: rotate(90deg);
          -ms-transform: rotate(90deg);
              transform: rotate(90deg); }
    .sk-fading-circle .sk-circle5 {
      -webkit-transform: rotate(120deg);
          -ms-transform: rotate(120deg);
              transform: rotate(120deg); }
    .sk-fading-circle .sk-circle6 {
      -webkit-transform: rotate(150deg);
          -ms-transform: rotate(150deg);
              transform: rotate(150deg); }
    .sk-fading-circle .sk-circle7 {
      -webkit-transform: rotate(180deg);
          -ms-transform: rotate(180deg);
              transform: rotate(180deg); }
    .sk-fading-circle .sk-circle8 {
      -webkit-transform: rotate(210deg);
          -ms-transform: rotate(210deg);
              transform: rotate(210deg); }
    .sk-fading-circle .sk-circle9 {
      -webkit-transform: rotate(240deg);
          -ms-transform: rotate(240deg);
              transform: rotate(240deg); }
    .sk-fading-circle .sk-circle10 {
      -webkit-transform: rotate(270deg);
          -ms-transform: rotate(270deg);
              transform: rotate(270deg); }
    .sk-fading-circle .sk-circle11 {
      -webkit-transform: rotate(300deg);
          -ms-transform: rotate(300deg);
              transform: rotate(300deg); }
    .sk-fading-circle .sk-circle12 {
      -webkit-transform: rotate(330deg);
          -ms-transform: rotate(330deg);
              transform: rotate(330deg); }
    .sk-fading-circle .sk-circle2:before {
      -webkit-animation-delay: -1.1s;
              animation-delay: -1.1s; }
    .sk-fading-circle .sk-circle3:before {
      -webkit-animation-delay: -1s;
              animation-delay: -1s; }
    .sk-fading-circle .sk-circle4:before {
      -webkit-animation-delay: -0.9s;
              animation-delay: -0.9s; }
    .sk-fading-circle .sk-circle5:before {
      -webkit-animation-delay: -0.8s;
              animation-delay: -0.8s; }
    .sk-fading-circle .sk-circle6:before {
      -webkit-animation-delay: -0.7s;
              animation-delay: -0.7s; }
    .sk-fading-circle .sk-circle7:before {
      -webkit-animation-delay: -0.6s;
              animation-delay: -0.6s; }
    .sk-fading-circle .sk-circle8:before {
      -webkit-animation-delay: -0.5s;
              animation-delay: -0.5s; }
    .sk-fading-circle .sk-circle9:before {
      -webkit-animation-delay: -0.4s;
              animation-delay: -0.4s; }
    .sk-fading-circle .sk-circle10:before {
      -webkit-animation-delay: -0.3s;
              animation-delay: -0.3s; }
    .sk-fading-circle .sk-circle11:before {
      -webkit-animation-delay: -0.2s;
              animation-delay: -0.2s; }
    .sk-fading-circle .sk-circle12:before {
      -webkit-animation-delay: -0.1s;
              animation-delay: -0.1s; }
  
  @-webkit-keyframes sk-circleFadeDelay {
    0%, 39%, 100% {
      opacity: 0; }
    40% {
      opacity: 1; } }
  
  @keyframes sk-circleFadeDelay {
    0%, 39%, 100% {
      opacity: 0; }
    40% {
      opacity: 1; } }