This is a really cool and smart guy from YC
He's a bit of an inspiration to me because he's a teacher, and he knows what he's doing.
The picture isn't very good, i know. I had all the lines done properly and then photoshop crashed and I lost all the layers, and I didn't have it saved as a PSD, only as a jpeg. So, when I tried to make layers again and colour it, it went all pixel-tastic

I'll probably re-do it in the future. Until then, here it is