The “Water Light Graffiti” is an interactive art project by Antonin Fourneau. On a surface made of thousands of LEDs that react to the contact of water, viewers are invited to make graffiti with water guns, spray bottles, or just their fingers. The result is a brilliant ever-changing light display that mimics street art. From Digitalarti:
Water Light Graffiti is a wall for ephemeral messages in the urban space without deterioration. A wall to communicate and share magically in the city.