Voronoi in multiple cells

Hi there. Just a simple step that I’m not able to achieve.
I want to create a similar voronoi pattern in each of the main voronoi cells. But whenever I connect multiple cells it gives me an error. Can anyone let me know which part I’m doing it wrong.
Much thanks in Advance! Cheers!

VORO1.gh (12.1 KB)

Something like this? It’ll take some time to open it.

VORO1_re.gh (29.8 KB)