.wrapper{height:100%;display:flex;justify-content:center;align-items:center;position:relative;overflow:hidden}.cells{position:absolute;inset:0;background:repeating-radial-gradient(circle at center,transparent 0 10px,rgba(255,255,255,.2) 100px 100px);animation:pulse 5s infinite;mask-image:radial-gradient(circle,#000 10%,transparent 90%)}@keyframes pulse{0%{background-size:0 0}to{background-size:100% 100%}}