how to make image background css png code example

Example 1: css background image

background-image: url("image.gif");

Example 2: background-image url( background.png )

body {
  /* Base64 encoded transparent gif */
  background: url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7);
}