* {
	margin:0;
	padding:0;
}
ul,ol {
	list-style:none;
}
#play {
	width:500px;
	height:300px;
	margin:20px auto;
	position:relative;
	overflow:hidden;
}
#play #ul {
	position:absolute;
}
#play #ul li {
	float:left;
}
#play #ul li img {
	width:500px;
	height:300px;
}
#play #ol {
	position:absolute;
	top:500px;
	left:350px;
}
#play #ol li {
	width:10px;
	height:10px;
	border-radius:50%;
	border:2px solid green;
	float:left;
	margin:5px;
}
#play button {
	position:absolute;
	top:120px;
	font-size:50px;
	display:none;
}
#play #prev {
	left:10px;
}
#play #next {
	right:10px;
}
.bg {
	background:red;
}