body {
background-image: url(https://i.pinimg.com/736x/39/5a/bd/395abdf6160e21a3d695c63e7a42cad6.jpg);
background-size: 500px;
background-attachment: fixed;
}

main {
background-image: url(https://i.pinimg.com/736x/80/e3/57/80e357d2ea208c6ce23ce541e80677dd.jpg);
background-size: 200px;
}