/* spin an image in a loop in the x axis */
@-webkit-keyframes spin {
    from { -webkit-transform: rotate(0deg); }
    to { -webkit-transform: rotate(360deg); }
}
@-moz-keyframes spin {
    from { -moz-transform: rotate(0deg); }
    to { -moz-transform: rotate(360deg); }
}
@-ms-keyframes spin {
    from { -ms-transform: rotate(0deg); }
    to { -ms-transform: rotate(360deg); }
}
@-o-keyframes spin {
    from { -o-transform: rotate(0deg); }
    to { -o-transform: rotate(360deg); }
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.spin {
    -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;
    -o-animation-name: spin;
    -o-animation-duration: 4000ms;
    -o-animation-iteration-count: infinite;
    -o-animation-timing-function: linear;
    animation-name: spin;
    animation-duration: 4000ms;
    animation-iteration-count: infinite;
    animation-timing-function: linear;

    position: absolute;
    top: 50%;
    left: 25%;
    margin-top: -50px;
    margin-left: -50px;
    transform: translate(50%, 50%);
}