Go to the SubtlePatterns Bookmarklet page, and you'll be able to drag and drop the bookmarklet on to your toolbar.
Click left/right arrows to move between patterns (or use left and right arrow keys)
The bookmarklet is under a MIT license and the patterns are under a Creative Commons Attribution-ShareAlike 3.0 Unported License
make to compile the CoffeeScript and Less files.
Run a static HTTP server one level up with
python -m SimpleHTTPServer