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\section{Our \section{Prototype}  \subsection{Early  Prototype} The program begins by setting up the various interface kits. It first waits for the main interface kit (with screen), the circular touch phidget, and the RFID reader to be connected. It then adds listeners to the circular touch and RFID phidgets to detect events as and when they happen. Once the start-up procedure is complete, the program state moves into the main loop of running code. This main loop performs all the major operations on the main interface kit. These operations include:  \begin{itemize}