.container{width: 1000px;  margin: 0 auto;}
.bannerHome{height:319;width:1000px;}

.banner {
    width: 1000px;
    height: 319px;
    background-image: url('banner_sprite.png');
    background-repeat: no-repeat;
    animation: flashBanner 3s steps(70) infinite;
}

@keyframes flashBanner {
    from {
        background-position: 0 0;
    }
    to {
        background-position: -70000px 0;
    }
}