I recently picked up a couple more of these LED matrices from Adafruit. I've used one of these before and have been happy with the library put out by Adafruit. Each matrix requires 12 pins and only works (rather, the library only works) with the Uno or Mega. I am wanting to duplicate the image onto 2 to 4 different matrixes, but hope to get away from using 4 separate Arduinos. How might I go about doing so?