#arrow{position:fixed;bottom:20px;left:50%;width:50px;height:50px;border-radius:100%;background:white;box-shadow:10px 10px 5px #aaa;display:none;align-items:center;justify-content:center;color:black;animation:bounce 1s infinite;-webkit-animation:bounce 1s infinite}@keyframes bounce{0%,20%,50%,80%,to{transform:translateY(0)}40%{transform:translateY(-10px)}60%{transform:translateY(-5px)}}@-webkit-keyframes bounce{0%,20%,50%,80%,to{transform:translateY(0)}40%{transform:translateY(-10px)}60%{transform:translateY(-5px)}}