div#wave{position:relative;text-align:center;margin-left:auto;margin-right:auto}div#wave .dot{display:block;width:5px;height:5px;border-radius:50%;margin:0 auto 15px;background:#303131;animation:wave 1.3s linear infinite}div#wave .dot:nth-child(2){animation-delay:-1.1s}div#wave .dot:nth-child(3){animation-delay:-0.9s}@keyframes wave{0%,60%,100%{opacity:0}30%{opacity:1}}