The applet at the bottom of this page -- assuming that you have a Java-enabled browser -- lets you write and run programs written in the "xTurtle" programming language. This applet was written by David Eck for use with his introductory computer science textbook The Most Complex Machine. However, it can also be used on its own. The xTurtle language is designed to be simple enough to learn easily, but complex enough to teach some important programming concepts.
The applet below is set up to load some sample programs. Use the pop-up menu in the upper left corner of the applet, and click on the Run Program button to see what it does. Full information is available about the applet and the xTurtle language on xTurtle Info page. A set of tutorial examples is also available.
For a list of other applets and for lab worksheets that use the applets, see the index page.