.arrow-wrap {
  position:absolute;
  z-index:1;
  left:50%;
  bottom:-10px;
  margin-left:-5em;
  background: rgba(230,230,230,0);
  width:10em;
  height:10em;
  padding:4em 2em;
  border-radius:50%;
  font-size:5px;
  display:block;
  border: 1px solid rgba(0,0,0,.2);
  /*box-shadow:0px 0px 5px 0px #333;*/
}

.arrow {
  float:left;
  position:relative;
  width: 0px;
height: 0px;
border-style: solid;
border-width: 3em 3em 0 3em;
border-color: rgba(0,0,0,.2) transparent transparent transparent;
  -webkit-transform:rotate(360deg)
}




.hint {
  position:absolute;
  top:0.6em;
  width:100%;
  left:0;
  font-size:2em;
  font-style:italic;
  text-align:center;
  color:#fff;
  opacity:0;
}


.arrow-wrap:hover .hint {
  opacity:1;
}


  @-webkit-keyframes arrows {
    5% { top:0; }
    10% { top:16%; }
    15% { top:0; }
    20% { top:16%; }
    25% { top:-16%; }
    30% { top:16%; }
    35% { top:0; }
    100% { top:0; }
  }
  
  .arrow-wrap .arrow {
    -webkit-animation: arrows 5s 1s infinite;
    -webkit-animation-delay: 1s;
  }