#overlay {
  background: #f5f5f5;
  width: 100%;
  position: fixed;
  z-index: 9999;
  height: 100%;
  top: 0;
}

#overlay .spinner {
  margin: 100px auto 0;
  width: 70px;
  text-align: center;
}

#overlay .spinner > div {
  width: 18px;
  height: 18px;
  background-color: #333;

  border-radius: 100%;
  display: inline-block;
  -webkit-animation: bouncedelay 1.4s infinite ease-in-out;
  animation: bouncedelay 1.4s infinite ease-in-out;
  /* Prevent first frame from flickering when animation starts */
  -webkit-animation-fill-mode: both;
  animation-fill-mode: both;
}

#overlay .spinner .bounce1 {
  -webkit-animation-delay: -0.32s;
  animation-delay: -0.32s;
}

#overlay .spinner .bounce2 {
  -webkit-animation-delay: -0.16s;
  animation-delay: -0.16s;
}

@-webkit-keyframes bouncedelay {
  0%, 80%, 100% {
    -webkit-transform: scale(0.0)
  }
  40% {
    -webkit-transform: scale(1.0)
  }
}

@keyframes bouncedelay {
  0%, 80%, 100% {
    transform: scale(0.0);
    -webkit-transform: scale(0.0);
  }
  40% {
    transform: scale(1.0);
    -webkit-transform: scale(1.0);
  }
}