.right-side{
    position: fixed;
    right: 0;
    top: 0;
    width: 250px;
    height: 100%;
    background-color: #ffffff;
    background-image: url('https://sadchi.com/p/test/inter/src/image/sales/new.png');
    background-size: cover;
    background-repeat: no-repeat;
}
.main-sales{
    width: 100%;
    height: 100%;
}
.main-sales a div {
    width: 100%;
    height: 100%;
    background-image: url('https://sadchi.com/p/test/inter/src/image/sales/new.png');
}