Neat. It just gave me an idea of what this could be useful for. I guess a big thing in TV teleprompters is to make it look like the reader is looking straight into the camera, rather than below or above it at the teleprompter. A "homebrew" teleprompter could be made by placing a piece of glass at a slight angle between the video camera and the reader. Then place a monitor(or easier a flexible laptop) below the glass at such an angle that the reader can read the scrolling text reflected off of the glass, while appearing to be staring straight into the lens. I havn't experimented yet with the "flip" direction, but you should be able to keep a continuous left-to-right text scroll going, if you feed the images to a Tk Canvas and keep left-shifting them. :-)