.spin {
	position: absolute;
	top: 25%;
	left: 25%;
	display: block;
	max-width: 50%;
	max-height: 50%;
    -webkit-animation: spin 2s infinite linear;
}

@-webkit-keyframes spin {
    0%  { -webkit-transform: rotate(360deg); }
    100% { -webkit-transform: rotate(0deg); }   
}