![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpzvZIK8v2CSnoQEmVUC7zzeNz2VUxe3Cj-aYv5FkrQH_ImetGYT9VsNjDBFZvvrBDZOt9wbrHMkOlQejK6iB9fkb2Q67HWeYD2hyphenhyphenSLf_Ji8ga7sHv0m8KuEDiZt_Fz1IN52XB/s320/digital_water_pavilion.jpg)
"The Digital Water Pavilion is an interactive structure made of digitally-controlled water curtains and will be built at the entrance of the 2008 at Zaragoza.
The "water walls" that make up the structure consist of a row of closely spaced solenoid valves along a pipe suspended in the air. The valves can be opened and closed, at high frequency, via computer control. This produces a curtain of falling water with gaps at specified locations - a pattern of pixels created from air and water instead of illuminated points on a screen. The entire surface becomes a one-bit-deep digital display that continuously scrolls downward."
-- MIT press release
Earlier:
Billboard as Shower