body .vertical-centered-box{display:flex;align-items:center;justify-content:center;width:100%;height:100vh}.an-circle{width:15px;height:15px;background-color:#fff;border-radius:50%;margin:2px;animation:jump .5s ease-in infinite}.an-circle:first-of-type{background-color:#2a9d8f}.an-circle:nth-of-type(2){animation-delay:.1s;background-color:#f4a261}.an-circle:nth-of-type(3){animation-delay:.2s;background-color:#711498}@keyframes jump{0%{transform:translateY(0)}50%{transform:translateY(-15px)}}