.pulsating {
  position: absolute;
  top: 50%;
  left: 50%;
  box-sizing: border-box;
  height: 20vmin;
  width: 20vmin;
  margin: -10vmin;
  border-radius: 100%;
  background: #3498db;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-animation: codefights-pulsating 1s cubic-bezier(0.73, -0.6, 0.465, 1.64) infinite;
          animation: codefights-pulsating 1s cubic-bezier(0.73, -0.6, 0.465, 1.64) infinite;
}
.pulsating svg {
  fill: white;
  width: 16vmin;
  height: 16vmin;
}

@-webkit-keyframes codefights-pulsating {
  0% {
    box-shadow: 0 0 0 0vmin rgba(52, 152, 219, 0.2), 0 0 0 3vmin rgba(52, 152, 219, 0.2), 0 0 0 6vmin rgba(52, 152, 219, 0.2), 0 0 0 9vmin rgba(52, 152, 219, 0.2);
  }
  100% {
    box-shadow: 0 0 0 3vmin rgba(52, 152, 219, 0.2), 0 0 0 6vmin rgba(52, 152, 219, 0.2), 0 0 0 9vmin rgba(52, 152, 219, 0.2), 0 0 0 12vmin rgba(52, 152, 219, 0);
  }
}

@keyframes codefights-pulsating {
  0% {
    box-shadow: 0 0 0 0vmin rgba(52, 152, 219, 0.2), 0 0 0 3vmin rgba(52, 152, 219, 0.2), 0 0 0 6vmin rgba(52, 152, 219, 0.2), 0 0 0 9vmin rgba(52, 152, 219, 0.2);
  }
  100% {
    box-shadow: 0 0 0 3vmin rgba(52, 152, 219, 0.2), 0 0 0 6vmin rgba(52, 152, 219, 0.2), 0 0 0 9vmin rgba(52, 152, 219, 0.2), 0 0 0 12vmin rgba(52, 152, 219, 0);
  }
}