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A prelude introduces the algebraic calculation of a rainbow’s arc, reputed to be by Baruch Spinoza and dating back to 1687. A shadow observes itself, connecting two points. Through a series of single, double and triple exposures, the three colour records of 16mm film emulsion converge and diverge. Breath becomes a source of movement, and language transforms into frequencies, as if they could become light, through the recitation of three poems by Friedrich Nietzsche from 1887.