Turtles spin in circles, forming a hyponotic kaleidoscope actually composed of hundreds of other turtles spinning even more circles...

For detailed instructions on using the program, take a look at the info window from the Kaleidoscope model.

Download the StarLogoT source code for the Kaleidoscope model:
Download kaleidoscope

To run this file you need StarLogoT2002 for the Macintosh.
(download StarLogoT)

Click on one of the pictures to see a quicktime movie of the model: