Check Out Martin Kimbell
I discovered Martin Kimbell thanks to an image search. Here's a beautiful light drawing. I think it might have been done with an LED hula-hoop
Among his collection of long-exposure photographs and painting with light, are a few stunning lissajous curve drawings. I really love these, so I post a few of my favorites here.
Nice work Martin! How did you do it? Pendulum? Harmonograph?