Grass is a meditation on both the creative and destructive powers of human nature. Representations of the beginning of life progress into a dynamic collage in which all elements appear to be suspended in space and time — a fish in water, an embryo in the womb, human figures in perpetual, Muybridge-like motion — and culminate in an explosive barrage of warlike images. Traditional Japanese music accompanies Tanaka's computer-synthesized imagery, graphic designs and text, which together create a striking symmetry of image and sound.