.line{display:inline-block;height:14px;border-radius:2px;background:hsla(0,0%,51%,.2);background:linear-gradient(90deg,hsla(0,0%,51%,.2) 8%,hsla(0,0%,51%,.3) 18%,hsla(0,0%,51%,.2) 33%);background-size:800px 100px;animation:wave-lines 1.5s ease-out infinite}.w60{width:50px!important}@keyframes wave-lines{0%{background-position:-468px 0}to{background-position:468px 0}}