And I prepared a tiny »Behind the Scene«
The base of this rig is a cloner wich is controlled mostly by a shader effector.
And to get a motion without Keyframes you can use C-Motion.
Also the rig is connected to the seed of the random effector and the cloner,
so you can get many different versions with just one click.
Color is controlled over the mograph color shader.
If you wanna know more about that feel free to contact me.