<div class="arrow-container animated fadeInDown">
  <div class="arrow-2">
    <i class="fa fa-angle-down"></i>
  </div>
  <div class="arrow-1 animated hinge infinite zoomIn"></div>
</div>

/* icon: https://fortawesome.github.io/Font-Awesome/icons/ */
/* Animation: https://daneden.github.io/animate.css/ */

body{
  background: #263238;
}

.arrow-container{
  width: 100px;
  height: 100px;
  margin: 0 auto;
  position: absolute;
  bottom: 25px;
  left: 0;
  right: 0;
}

.arrow-1{
  width: 100px;
  height: 100px;
  background: #00BCD4;
  opacity: 0.5;
  border-radius: 50%;
  position: absolute;
}

.arrow-2{
  width: 60px;
  height: 60px;
  background: #00BCD4;
  border-radius: 50%;
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 1;
  display: table;
}

.arrow-2:before{
  width: 52px;
  height: 52px;
  content: "";
  border: 2px solid #006064;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
}

.arrow-2 i.fa{
  font-size: 30px;
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  color: #006064;
}

/* Custom Animate.css */

.animated.hinge {
  -webkit-animation-duration: 2s;
          animation-duration: 2s;
}

@-webkit-keyframes zoomIn {
  0% {
    opacity: 0;
    -webkit-transform: scale3d(.4, .4, .4);
            transform: scale3d(.4, .4, .4);
  }

  50% {
    opacity: 0.5;
  }
  
  100% {
    opacity: 0;
  }
}

@keyframes zoomIn {
  0% {
    opacity: 0;
    -webkit-transform: scale3d(.4, .4, .4);
            transform: scale3d(.4, .4, .4);
  }

  50% {
    opacity: 0.5;
  }
  
  100% {
    opacity: 0;
  }
}

.zoomIn {
  -webkit-animation-name: zoomIn;
          animation-name: zoomIn;
}