#busybox {
}

#busybox div {
    position: fixed;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 8px solid white;
    border-left-color: transparent;
    border-right-color: transparent;

    animation: busybox_kf 1s linear 0s infinite normal none running;
}

@keyframes busybox_kf {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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