Over the past several years Oakland-based artist Jesse Houlding has created a variety of incredible kinetic drawing devices using magnets and iron fillings. As a series of magnetic components move in various patterns behind the paper, the iron fillings leave a gradual residue that reveals a visual representation of the magnetic field holding them in place. Houlding says that he is interested in the accumulation of marks, specifically how time is evidenced in artwork and the relationship between process and end-results. You can see a couple more videos of his machines on his Youtube channel. Thanks Jesse for sharing your work with Colossal!