Hi!
Here's the general workflow I'd use for an effect like this:

Important settings for the Tile Sampler:
Blend mode: Max
Scale: Something big (like 3-5)
You can do the same thing with a Tile Generator, but it's not as powerful. If you ever want to improve the pattern, use the Tile Sampler. (You'll get even closer to your reference image!)
I hope it helps!
Robin