Art Tuesdays – Interactive Installation Detects Light to Open/Close
Designed by Berlin interactive artists Gunnar Green and Frederic Eyl, Aperture includes dozens of tiny aperture holes that (with a slight delay) open if there is no light and closes if there is. The result is the silhouette of passersby.
Source: http://scophy.com/2008/01/15/art-tuesdays-interactive-installation-detects-light-to-openclose/

