It Don't Mean a Thing …

King of the swingers: photographer builds giant pendulum to make amazing art

The [2D] swings combine with each other to create swirling designs called Lissajous figures.

The patterns are so stunning that machines like Blackburn’s Y-shaped pendulum were made commercially in the Victorian era. They became known as “harmonographs”, since the variation in images results from the variation in harmonies between the different swings.