Bruce Nauman Sky writing in Pasadena

Five plains were used to create this remarkable statement using dots to form a word. "LEAVE THE LAND ALONE".

Bruce Nauman had the initial idea since 1969 but waited until 2009 to release his ambition of over Pasadena for the Armory Center for the Arts.

I like the message because the language is very emotive maybe Nauman wanted people to think about the environment.