Hey, I've just got started with this library and it's really great but I'm

Hey, I’ve just got started with this library and it’s really great but I’m looking for a little help. On the ‘Basic Usage’, under the ‘Bringing in External Controls’ section how could I change the code so that I can have different colours for different LEDs? i.e. the first 6 LEDs are blue, the next 6 are red, and so on.