How to explain additive and substractie color mixing

I like to explain additive and substractie color mixing in a storyline project.

* I like to make 3 sliders for CMY and a object that change in a subtractive way colors when I move the sliders.

*And I want to make 3 sliders for RGB and a object that change in a additive way colors when I move the sliders. 

Is anyone who has e.g. a javascript to make this happen?