using Ruby or Python, does someone know how to draw on the screen, covering up any other window?  Kind of like, press a key, and the program will show current weather or stock quote on the screen (using the whole screen as the canvas), and then press the key again, and everything restores to the same as before?  (like Mac OS X's dash board).
I would recommend PyGame.
does someone know how to show content on screen (covering up any window) using Ruby or Python?