I have 3 cloned triangles. I have them set-up with multi-shaders (and a randomizer), so that each of these 3 cloned triangles has a randomized color.

When I close these 3 triangles, they all have the same 3 colors.

I need each 3 triangles to have random colors, and each of it's clones to all have random colors. How can I achieve this?

Here is the effect I need (I did this manually):