Guidance required for a material effect.

Hi everyone

I am very new to grasshopper and rhino. Just started working with these yesterday. I know it is a bit too early to ask the questions. Well i am attaching an image of the material effect that i am looking forward to create through rhino and grasshopper. But if only i know how to.  

I was thinking to create a module first and then aggregate it somehow in grasshopper over a surface to achieve that. Thats how i envisioned it. I have been going through a lot of tutorials and videos but no luck so far. 

I was hoping if anyone can help me out with the step by step execution of such effect, or guide me in the right direction for a better tutorial, it would be a huge favor.

Looking forward to hear from you guys.

Thanx,