Intrigued and inspired by the neon beer signs on shopfronts in his San Francisco neighborhood, Bruce Nauman created his first neon piece, Window or Wall Sign, in 1967. He wanted, he said, to achieve "an art that would kind of disappear—that was supposed to not quite look like art." Light offered Nauman a medium both elusive and effervescent, but one that could also aggressively convey a message.