You mean the things on each side of 47??
They are a light brown color and it's just supposed to represent debris flowing through the wind, as if he were outside.... Just to give it a "moving" sort of effect to it.
But thank you, yes I like it a lot myself. And no he just does drawling as a hobby. Unfortunately, I didn't get his artistic genes. I mean I can draw, but not like my father can. He can draw actual people and stuff like that and it looks amazing. He went to an art school when he was young.