Nifty CSS from the web

nifty-css-from-the-web

#button > .background {
position: absolute;
-webkit-animation: pulseCircle 2s ease-out infinite;
-moz-animation: pulseCircle 2s ease-out infinite;
-o-animation: pulseCircle 2s ease-out infinite;
-ms-animation: pulseCircle 2s ease-out infinite;
}