30 days of not drawing

Action created: 2015.09.20 (J/W)
Date conceived: 2016.09
Materials: Graphite, charcoal, erasers.
Drawing Action: Over the duration of one month (30 days) artist are tasked with making one drawing each day. J begins by making a mark, W follows and erases that make. The paper is flipped, W marks and J erasers. This continues each day, alternating who starts.
Preferred Documentation: Final drawings, time-lapse video.