Here's an example of doing PWM on an 8x8 RGB LED matrix:
http://blog.spitzenpfeil.org/wordpress/wp-content/uploads/2008/10/matrix_code.pde
Here's an example of doing PWM on an 8x8 RGB LED matrix:
http://blog.spitzenpfeil.org/wordpress/wp-content/uploads/2008/10/matrix_code.pde