Different concept but relevant gif
[hider=Epilepsy warning][img=http://38.media.tumblr.com/54098583beba5e4a6215e8bc344cc532/tumblr_ncwiitJk6g1r6g9m4o1_400.gif][/hider]
This is Benham's Disk. Stare into the center for long enough and you'll see colours in the 'sections' of the circle. Different people see different colours at different times.