Facade

Hi all..

It has been a while since I've used GH. So im very rusty now. I'm working on this facade for a project.

The example I'm trying to achieve is similar to a project by WorkAC, (see image).

My attempt is so far not successful, Attached is a screen shot of the results

Can anyone explain why the boxes are over scaling towards the right? and or perhaps would it be better if Id used an image sampler with the gradient pattern I would like my facade to achive?

Please help

Thank you