The heat sensitive static patterns create dynamically changing patterns. As you can see from the video below, the spectators also can leave traces on the surface through the sense of touch. The developer has used an Arduino with 12V power supply and 20 custom PCBs that drive and control 4 industrial 24V DC power supplies. These are responsible for heating 2 handmade textile that are embedded with nichrome wires and screen-printed with thermo-chromatic dying, so that they reveal the preprogrammed patterns.
Do take a look at the following video that shows this amazing electronic textile in action. The dynamic changes in the textile color derive from processed sound files. Silkscreen was used to cover the textile in a dye that changes with temperature. Sound makes the nichrome wires woven into the fabric heat up, changing the pattern.
Source: Chromosonic Tumblr