background-image() with image from a file code example
Example 1: how to set background image for web page in html local image
body { background-image: url(/path/to/image.png); }
Example 2: CSS adding background image from file
/* The first method using an image on your server */
background: url('img/someimage.jpg');
/* The second method using an image hosted on another server */
background: url('http://www.someimage.com/someimage.jpg');
/* A third method that allows the site to determine protocol instead of explicitly defining it */
background: url('//www.someimage.com/someimage.jpg');