Fractal Clock Screen Saver will run at six times normal speed in the preview window. When running full screen, it displays your local time.
Aside from the obvious difference that I move the locators automatically, I also allow the locators to be at any angle relative to the "trunk" of the tree (which is the hour hand in the screen saver).
The screen saver automatically adjusts its level of detail based on the speed and screen size of your Macintosh. Faster Macs and bigger screens will produce more detail.