https://laughingsquid.com/water-light-graffiti/
"Water Light Graffiti" is a wonderful wall of water-activated LEDs created by Antonin Fourneau that allows people create LED graffiti by "painting" it
light graffitiled wallwateractivated
https://weburbanist.com/2008/12/07/light-graffiti-art-photos/5-recycle-bean-comic-light-graffiti1/
Complex Comedic Light Graffiti of RB
light graffiticomplexcomedicrb