Abstract shapes dance to a beat, creating a visual symphony in the final installment of the series.

Walter Ruttmann's Lichtspiel Opus IV (1925) utilizes a technique of hand-painted geometric shapes on film stock, creating a dynamic interplay of form and movement. Opus IV is part of a series of abstract films Ruttmann titled "Lichtspiel," meaning "light play" in German. These works were groundbreaking in their exploration of pure visual motion and rhythm.

By stripping away narrative elements, Ruttmann aimed to evoke a more visceral and emotional response from viewers, engaging them in a new way of experiencing cinema.

The film's innovative use of color and abstraction is a hallmark of the German avant-garde cinema movement. Opus IV, along with other experimental films of the era, helped to redefine the very purpose and potential of film as an art form. These early explorations paved the way for future generations of filmmakers to push the boundaries of cinematic expression.