== asche / == ashes
A low current flows through the wire of a broken bulb, slightly heating it up. As people move through the space, the air surrounding them also moves.
Cold air decreases the electric resistance of the wire and so also the voltage. A circuit senses the change of environment and actuates a fan.
Amidst ashes, a couple of these units cover the space. So the dialogue between those present and those who pass by shapes a moving landscape.