tracking more than one colour

Hi,

I am a beginner with Jitter. But by using the tutorials I have managed to track the colour red using a macbook camera. Reasonably simple, but for my next task, how do I go about tracking an additional colour such as blue but in the same window?

I'm slowly trying to work towards different sounds being played when different colours are tracked. If anyone thinks this is going to be too hard for a beginner then please advise me of an easier route.

Thanks in advance.

Mike