body {
    background-image: url(./images/eightbit.gif);
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: calc(30% + 5px) auto;
    background-position-x: right;
}
@media screen and (max-width: 1250px) {
    body {
        background-image: none;
    }
}