OffOn (1968/2004)

Directed by Scott Bartlett

IMDb
Wikipedia

OffOn was released on the now out-of-print DVD box set Treasures From American Film Archives, which is fetching $350 on Amazon. Used copies are available for more reasonable prices. The film can also be seen on YouTube. (A brief clip from OffOn—set to Jimi Hendrix’s “Purple Haze”!—is shown in the documentary Berkeley in the Sixties.)