body {
background-image: url("img_tree.gif");
background-position: center;
background-repeat: no-repeat;
background-attachment: fixed;
background-size: cover;
}#hero1{
background:url(https://4.bp.blogspot.com/_AQ0vcRxFu0A/S9shDGGyMTI/AAAAAAAAAYk/kn3WTkY2LoQ/s1600/IMG_0714.JPG);
background-size:cover;
background-position:center center;
background-attachment:fixed;background-attachment:fixed;background-attachment: scroll;
background-attachment: fixed;
background-attachment: local;