spin.css

@-ms-keyframes spin {
    from { -ms-transform: rotate(0deg); }
    to { -ms-transform: rotate(360deg); }
}
@-moz-keyframes spin {
    from { -moz-transform: rotate(0deg); }
    to { -moz-transform: rotate(360deg); }
}
@-webkit-keyframes spin {
    from { -webkit-transform: rotate(0deg); }
    to { -webkit-transform: rotate(360deg); }
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.spin {
    /*margin: 20px;
    width: 100px;
    height: 100px;
    background: #f00;*/
    -webkit-animation-name: spin;
    -webkit-animation-duration: 4000ms;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-timing-function: linear;
    -moz-animation-name: spin;
    -moz-animation-duration: 4000ms;
    -moz-animation-iteration-count: infinite;
    -moz-animation-timing-function: linear;
    -ms-animation-name: spin;
    -ms-animation-duration: 4000ms;
    -ms-animation-iteration-count: infinite;
    -ms-animation-timing-function: linear;
    
    animation-name: spin;
    animation-duration: 4000ms;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
}