blue light

Over a year ago I had asked if anyone could help me in making blue light wig wags. Motogiro was nice enough to help me out with it and i finally have it all set up. Picture 009 - YouTube

So I recently became a volunteer firefighter which allows me to have a blue flashing light. My idea was to utilize the pod lights. What do I have to do in order to first put blue lights in and second have them alternate back and forth (wig-wag). Does anybody else use emergency blue lights on...