/* MY OPERA GENERATED CSS */
body {
	background-color: #FFFFFF;
	background-image: url(http://files.myopera.com/lelinh0422/.usercss/body.JPG);
	background-position: 0 0;
	background-repeat: no-repeat;
}
/* END OF MY OPERA GENERATED CSS */

http://files.myopera.com/user của blog sẽ lấy theme/user.css