This diagram illustrates how a background image may
be repeated within the content and padding areas
of a box.
In this example, a background image is first centered within
a box (established by the BODY element of the example). The box
contains paragraphs of text, shown in gray to make them
discrete.
The image, a blue wavy line on a pale yellow background,
is then repeated vertically, to the top and bottom of
the BODY box. The effect is to create a wavy band down the
center of the page.
