Places a borderless transparent window on the desktop, and sets it to always below. This creates the effect that it is part of the desktop (if you want stuff to actually be on the desktop, see RootText). This window can then have text displayed in it.
The horizontal position of the top left of the window (in pixels).
The vertical position of the top left of the window (in pixels).
The horizontal size of the window (in pixels).
The vertical size of the window (in pixels).
A file to be used as the background image for the window.
Makes the window black if it doesn't have a background image, and darkens the background image if it does.
The text colour.
The text font.
pattern_name, pattern, and pattern_action are experimental.