Yihui Xie

vi.lilac.chaser()

Visual Illusions: Lilac Chaser

Yihui Xie & Lijia Yu / 2017-04-04


Stare at the center cross for a few (say 30) seconds to experience the phenomena of the illusion.

Just try it out.

library(animation)
ani.options(interval = 0.05, nmax = 20)
par(pty = "s")
vi.lilac.chaser()