Animação CSS3/HTML5

gistfile1.css

#box {
	text-align: center;
	background: green;
	padding: 40px;
	width: 200px;
	color: #fff;
	margin: 0 auto;
	border-radius: 5px;
	font-weight: bold;
}

/* animação */
.animate {
	-webkit-backface-visibility: hidden;
	-moz-backface-visibility: hidden;
	-ms-backface-visibility: hidden;
	backface-visibility: hidden;
	-webkit-animation-duration: 1s;
	-webkit-animation-delay: .2s;
	-webkit-animation-timing-function: ease;
	-webkit-animation-fill-mode: both;
	-moz-animation-duration: 1s;
	-moz-animation-delay: .2s;
	-moz-animation-timing-function: ease;
	-moz-animation-fill-mode: both;
	-ms-animation-duration: 1s;
	-ms-animation-delay: .2s;
	-ms-animation-timing-function: ease;
	-ms-animation-fill-mode: both;
	animation-duration: 1s;
	animation-delay: .2s;
	animation-timing-function: ease;
	animation-fill-mode: both;
}