background css

body {
  background: #ffffff url("img_tree.png") no-repeat fixed right top;
}/*CSS background Property

Example
Set different background properties in one declaration:
*/
body
 { 
   background: lightblue url("img_tree.gif") no-repeat fixed center; 
 } 
 /* Color (Example: red): */
html,body {
  background-color: red;
}

/* Image (Example: your.picture): */
html,body {
  background-image: url("your.picture");
}