This is a brief demonstration of a multi-touch library I have developed to support my thesis project. The library is free for public use (GPLv3). The tuioZone library for Processing provides a way to set zones within a multi-touch screen to respond in useful ways to TUIO events. It processes TUIO events and provides methods to get data about each zone and related TUIO events. This library is very much a work in progress. jlyst.com/tz/