Chan Hwee Chong was born in Singapore and lives in Germany. He is a graphic artist and the following were done for Faber-Castell, a company that makes pens. I own a set of their technical pens from when I was in Engineering Drawing and Graphic Design. I love them but have no use for them anymore, sadly.
He starts with a blank sheet of paper and one pen. He starts in the middle and spirals out to the edge in one line. I see to post a lot of art that is better appreciated from a distance. Regardless, this is kind of amazing.
Chan Hwee Chong is a graphic artist and works in advertising. You can view some of his other work here.