#frame {
	position:absolute;
	width:300px;
	height:200px;
	overflow:hidden;
	border-radius:5px
}
#dis {
	position:absolute;
	left:-50px;
	top:-10px;
	opacity:.5
}
#dis li {
	display:inline-block;
	width:200px;
	height:20px;
	margin:0 50px;
	float:left;
	text-align:center;
	color:#fff;
	border-radius:10px;
	background:#000
}
#photos img {
	float:left;
	width:300px;
	height:200px
}
#photos {
	position:absolute;
	z-index:9;
	width:calc(300px * 4);
	/*---修改图片数量的话需要修改下面的动画参数*/
}
.play {
	animation:ma 20s ease-out infinite alternate;
}
@keyframes ma {
	0%,25% {
	margin-left:0px;
}
30%,50% {
	margin-left:-300px;
}
55%,75% {
	margin-left:-600px;
}
80%,100% {
	margin-left:-900px;
}
}