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

ol.cp_clist {
	counter-reset:cp_clist;
	padding: 0.5em;
}
ol.cp_clist li{
	list-style-type:none;
	position:relative;
	display: block;
	line-height: 1.3em;
	padding: 0em 0.3em 0.3em 1.7em;
}
ol.cp_clist li::before {
	position: absolute;
	top: 0.2em;
	left: 0em;
	/* カウントさせる */
	counter-increment: cp_clist;
	content: counter(cp_clist);
	/*装飾*/
	padding: 0 0.2em 0 0.2em;
	background: #4CAF50;
	color:#fff;
	font-weight: bold;
	height: 1.3em;
	width: 1.3em;
	text-align: center;
	border-radius: 50% 1%;
}