Negative Space Bicycle

This is a sketch that I made in class of a bicycle laying upside down on the bench in the lobby of the studio arts building. At first I was a little unsure of where to start on the sketch and as you can see I used pen so that it would display a sense of permanence to this drawing. So i started on the front tire of the bike (on the left side) and worked my way around the tire and down the frame of the bicycle. I was actually very pleased with the end result of this drawing. I feel like this may be a big improvement from my last negative space sketches.