body, #primaryContent{
background-image:url(https://t1.daumcdn.net/cafeattach/1MThB/3174525f5426310e5e93589fdee84691da76e604);
background-attachment: fixed; 
background-color:#ffffff;
background-repeat: no-repeat ; 
background-position: center bottom; 
background-size: cover; 
}