.full {
    position: absolute;
    width: 100%;
    height: auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    display: block;
}

.zoom {
    animation: scale 10s linear infinite;
}

@keyframes scale {
    70% {
        -webkit-transform: scale(1.2);
        -moz-transform: scale(1.2);
        -ms-transform: scale(1.2);
        -o-transform: scale(1.2);
        transform: scale(1.2);
    }
}