body, #primaryContent { background-image: 
url(https://t1.daumcdn.net/cafeattach/1ZFir/76f98d976924d77e187ec4a4815752396d32eb36),
url(https://t1.daumcdn.net/cafeattach/1ZFir/401ffeb15f76e11a77a9124f211da88491388808),
url(https://t1.daumcdn.net/cafeattach/1ZFir/1c195bdd02184c06922947fe178cdc79772d0a6b);
background-attachment: fixed;
background-color: #; 
background-repeat: no-repeat; 
background-position: top right, bottom right 150px, bottom right;
background-size: 800px, 400px, cover;
}