sentences:  By 1953 he had created a “light machine” that combined keyboard, glass, speakers, and homemade projectors and colored lights that responded to changes in pitch, register, and volume, which was an early precursor of the psychedelic light shows of the '60s—and years before the light shows of Haight-Ashbury.Jerry Garcia of The Grateful Dead studied with Wally Hedrick and Elmer Bischoff at San Francisco Art Institute.It was the only school Garcia would ever be proud of attending.