Drastic attrator point with 3D Voronoi

Hello

So i’m trying to get this result for a school project, the 3D voronoi i undertsand and have the model. what i cant figure out is how to have such a drastic transition with a subtle gradiant inbetween.

I’m assuming its with a point attractor.

VORINOI 3D.3dm (52.4 KB)

VORINOI 3d.gh (8.9 KB)

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