I can't be the only one who just wants a nice background for their chat frame without a bunch of unnecessary features tacked on, right? Right?
This is a very simple addon that displays a texture on your screen. It doesn't have an in-game configuration, profiles, scripts or anything else you might be used to from other, similar addons. What it does have is a very simple, easy to understand and edit .lua file and a memory footprint of less than 1 KB.
You will probably want to open up core.lua and change some settings - particularly size and positioning - to your liking.