Triangle is a little program I wrote (my first post on ticalc) which demonstrates the use of greyscale in TIGCC. Two triangles are created, one at grey 67% and one at grey 33%, which move about the screen and bounce off the edges. The source is included. Feel free to modify it or use it in your own programs. I have only tested it on a TI-89 Ti HW4 but it should work on all 89s.

Joshua Weberruss