@keyframes FadeInOut {
    0% {opacity:1;}
    100% {opacity:0;}
}

#fading img.top {
    -webkit-animation-name: FadeInOut;
    -webkit-animation-timing-function: ease-in-out;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-duration: 10s;
    -webkit-animation-direction: alternate;
}