The Wallace Clock may look rather standard, excusing the tiered border for a moment, but it a couple of clever tricks up its sleeve. It is an interactive time-teller that plays with people's perspective as soon as they begin to approach it. Equipped with an Arduino Uno light and a distance sensor, the Wallace Clock slows down as it senses someone is close and speeds up to the proper time as soon as they walk away.
Designed by Marlene Kettner and Sharon Williams, students at the Interaction Design at the Umeå Institute of Design in Sweden, the Wallace Clock is so subtle that people might not realize what it is doing right away. Nevertheless, when the lights are turned off, people will notice when it starts ticking backwards.