"Pendulum Swing" is a series of woodcut monoproints (a special one of a kind impression) with a focus on concentric spirals. The graphics were generated using a harmonograph drawing apparatus. This tool employs pendulums to create a geometric image as it swings and looses momentum. By overlapping the spirals, changing colours and printing order I was able to generate moire effects and unexpected optical results. Many of the works in this collection combine woodcuts from other series and prints that had previously been unfinished.