Enigma (1972)

“Lines and rectangles are the geometric shapes basic to ENIGMA, a computer graphics film full of subliminal and persistent image effects. In a staccato rhythm, the film builds to a climax by instantly replacing one set of shapes with another, each set either changing in composition and color or remaining for a moment to vibrate strobiscopically and then change.” – The Booklist.

Enigma has a runtime of 4 minutes.