Here is the Arduino code (see attachment) for the three haptics projects we made this week. Not exactly pretty production code, but good enough to start hacking around with. The key pieces are the timings and intensities, so pay special attention to those.

You'll also need to uncomment the various function calls in the loop() to make different projects work. They should be self-explanatory, be give me a holler if you run into issues. You can leave comments on this post by logging in with your A server name and password.