body {
	background: #00CCCC;
}

ul {
	list-style-type: none;
}

li {
    display: inline-block;
	height: 210px;
	width: 210px;
    text-align: center;
	margin-left: auto;
	margin-right: auto;
    text-align: center;
}

li a {
	height: 210px;
	width: 210px;
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

li a img {
    display: block;
	margin-left: auto;
	margin-right: auto;
	border: 1px solid black;
}