/* Chrome, Safari, Opera */
@-webkit-keyframes zoom {
    0% {
        -webkit-transform: scale(1,1);
    }
    50% {
        -webkit-transform: scale(1.15,1.15);
    }
    100% {
        -webkit-transform: scale(1,1);
    }
}

/* Standard syntax */
@keyframes zoom {
    0% {
        transform: scale(1,1);
    }
    50% {
        transform: scale(1.15,1.15);
    }
    100% {
        transform: scale(1,1);
    }
}


.slides img {
    -webkit-animation: zoom 10s ease-in-out infinite; /* Chrome, Safari, Opera */
    animation: zoom 10s ease-in-out infinite;
}