<ol class="cp_clist">
	<li>css</li>
	<li>html</li>
	<li>copy</li>
	<li>easy</li>
</ol>

ol.cp_clist {
	counter-reset: cp_clist;
	list-style: none;
	padding: 0.5em;
}
ol.cp_clist ol{
	margin: 0 0 0 35px;
	padding: 0em;
}
.cp_clist li {
	position: relative;
	display: block;
	padding: 4px 4px 4px 31px;
	margin: 7px 0;
	background: #9FA8DA;
	color: #333;
	text-decoration: none;
	border-radius: 5px;
	transition: all .3s ease-out;
}
.cp_clist li::before{
	counter-increment: cp_clist;
	content: counter(cp_clist);
	position: absolute;
	top: 50%;
	left: -15px;
	padding: 0 0.2em 0 0.2em;
	margin-top: -15px;
	height: 28px;
	width: 28px;
	font-weight: bold;
	background: #3F51B5;
	color: #fff;
	border: 3px solid #fff;
	text-align: center;
	border-radius: 50%;
	transition: all .3s ease-out;
}
.cp_clist li:hover{
	background: #C5CAE9;
}
.cp_clist li:hover::before{
	left: -10px;
	transform: rotate(360deg);
}