.starbg{
    overflow: hidden;
}
.star_bg{
    background: black url(main/starbg.png) repeat;
    filter: drop-shadow(0 0 20px white);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -100;
    animation: StarMove 200s linear infinite;
}
.star_mg{
    background-color: black;
    background:url(main/starmidground.png) repeat;
    filter: drop-shadow(0 0 20px white);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -99;
    animation: StarMove 150s linear infinite;
}
.star_fg{
    background:url(main/starforeground.png) repeat;
    filter: drop-shadow(0 0 20px white);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -98;
    animation: StarMove 120s linear infinite;
}
@keyframes StarMove {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 10000px 5000px;
    }
}