.l3{width:60px;aspect-ratio:2;--_g:no-repeat radial-gradient(circle closest-side,#000 90%,#0000);background:var(--_g) 0 50%,var(--_g) 50% 50%,var(--_g) 100% 50%;background-size:calc(100%/3) 50%;animation:l3 1s linear infinite}@keyframes l3{20%{background-position:0 0,50% 50%,100% 50%}40%{background-position:0 100%,50% 0,100% 50%}60%{background-position:0 50%,50% 100%,100% 0}80%{background-position:0 50%,50% 50%,100% 100%}}