Hi kevin
The black and white is set in the Multi shader inside the Luminant material I put on the sphere, this could be any two colours and it would switch between them, I think with the color shader you get more blending.
The light on and off is just the visibility option in the second shader effector, so its either there or not depending on the noise colour, once it passes 50% threshold.
It is a more tricky prospect than it first appears.
Deck