html,body {
	margin:0px;
	padding:0px;
}
@keyframes animation {
	from {background: red;}
	to {background: yellow;}
}

@-webkit-keyframes animation {
	from {background: red;}
	to {background: yellow;}
}
h1 {
	padding:12px;
	background:#000;
	animation: animation 5s;
    -webkit-animation: animation 5s; /* Safari 与 Chrome */
    color: #fff;
    text-align: center;
    font-size: 36px;
    line-height: 30px;
}
#box {
	border: 1px dotted #CCC;
	margin:30px;
	padding:20px;
}