.box-out {
	position:relative;
	width:65px;
	height:65px;
}
.wifi {
	width:65px;
	height:65px;
	position:absolute;
	border-radius:100%;
	left:0;
	top:0;
	background:url("http://www.jq22.com/tp/c7bab3d6-d1bf-41b6-91ad-b6539d46f46d.jpg") 0 3px no-repeat;
	animation:wifiEmit 2500ms infinite;
}
@keyframes wifiEmit {
	25% {
	width:15px;
	height:15px;
	top:25px;
	background-position:0 -21px;
}
50% {
	width:25px;
	height:25px;
	top:20px;
	background-position:0 -16px;
}
75% {
	width:45px;
	height:45px;
	top:12px;
	background-position:0 -8px;
}
100% {
	top:0;
	width:65px;
	width:65px;
	background-position:0 3px;
}
}