You can see two result clips on the video below. The first one is the exact tutorial result and the other is the result with a few modifications. I've set the canvas to white (for the second one) and I've also added a second material for the cylinders. Cylinders close to the center use the red material while at the edges the objects use a second (orange-ish) material. Lots of potential here, again. Feel free to experiment. Don't forget that different noise settings will give us different 'paintings'.
Download and study the result file(s) over at Blendswap.