Hello everyone, longtime reader, first time poster. A friend and I discovered this piece of math graffitied on an obscure laneway wall in Melbourne. I find it a bit mindblowing that someone would go to all this effort, particularly in a place where very few people are going to see it. As you can see from the video, it is quite neat and meticulously done. I understand parts of it, there are some parts I don't understand, but really I have two major questions I was hoping you guys could help me out with. 1. What is it trying to say overall. What is all this math 'for'? 2. (Bonus marks) What drove this person to do this? Thanks for your time.