Sun Boxes by Craig Colorusso are an environment to enter and exit at will. It’s comprised of twenty speakers operating independently, each powered by the sun via solar panels. There is a different loop set to play a guitar note in each box continuously. These guitar notes collectively make a Bb chord. Because the loops are different in length, once the piece begins they continually overlap and the piece slowly evolves over time.
Here is a video, Sun Boxes at the 12th annual Sculpture at Maudslay. Filmed by Kevin Belli on September 18, 2010.