리사주 스피로그래프
https://en.wikipedia.org/wiki/Lissajous_curve Lissajous curve - Wikipedia Mathematical curve outputted from a specific pair of parametric equations Not to be confused with spirographs, which are generally enclosed by a circular boundary, whereas Lissajous curves are enclosed by rectangular boundaries. A Lissajous figure, made by en.wikipedia.org https://en.wikipedia.org/wiki/Spirograph Spirograp..