body { background-color: #B5D339}
img { display:block; margin-left:auto; margin-right:auto;}
div.center {margin-left:auto; margin-right:auto; margin-top:10%;}
span { 
	color: #dddddd;
    display: block;
    font-size: 4em;
    text-align: center;
    vertical-align: middle;
}