:root{--duration:20s}body{overflow:hidden;background:#000;height:100vh;margin:0;padding:0}#white{position:absolute;display:flex;animation:var(--duration)linear alternate infinite move;background:#fff;border-radius:50%;justify-content:center;align-items: center;width:10vw;height:10vw;top:50%}#white>img{animation:var(--duration)steps(1,start)flip;width:30%;height:auto}@keyframes move{0%{transform:translateY(-50%)translate(0)}to{transform:translateY(-50%)translate(100vw)translate(-100%)}}@keyframes flip{0%{transform:scaleX(1)}to{transform:scaleX(-1)}}