Norimichi Hirakawa is a Japanese artist whose work centralizes in real-time digital audio-visual installations. The series of video, The Irreversible, is generated by a time-evolutionary algorithm. The process starts from randomizing the initial constants. As described by the artist, “everything within the video is just a result of meaningless calculation.” Math calculation is Hirakawa’s variables and parameters, and the final results are somehow confusing but appealing at the same time. The audience are astonished by the strong visual impact. The background sound fits into the visual rhyme well. Through two-dimensional media, such as lines and points, Hirakawa achieves a three-dimensional effect.