.pulse{width:100%;color:#fff;text-align:center;line-height:100px;padding:20px;position:relative}.pulse:after,.pulse:before{content:"";position:absolute;padding:20px;left:-5px;right:-5px;top:-20px;bottom:-20px;border:1px solid red;border-radius:8px;animation:pulse 1.5s linear infinite}.pulse:after{animation-delay:.5s}@keyframes pulse{0%{transform:scale(.5);opacity:0}50%{transform:scale(1);opacity:1}to{transform:scale(1.2);opacity:0}}.slider{width:800px;height:400px;background:url(/public/gif-phone-black.png);animation:change-bg 10s linear infinite}@keyframes change-bg{0%{background:url(/public/gif-phone-black.png)}50%{background:url(/public/gif-phone-blue.png)}to{background:url(/public/gif-phone-pink.png)}}.radialGradient{background:radial-gradient(ellipse at center,#4e4f56 0,#000 55%,#000 100%)}