San Jose Semaphore, by artist Ben Rubin, is a permanent public artwork commissioned by Adobe Systems Incorporated in collaboration with the City of San Jose’s Office of Cultural Affair’s Public Art Program.

Located within the top floors of Adobe’s Almaden Tower headquarters in San Jose, California, San Jose Semaphore is a multi-sensory kinetic artwork that illuminates the San Jose skyline with the transmission of a coded message. The content of the San Jose Semaphore’s message is a mystery; cracking the encryption technique and deciphering the message is posed as a challenge for the public. (Ben Rubin – San Jose Semaphore)

Via Rhizome.org.