An amateur scientist article says to make a copy of Roger Hayward's disk (above) enlarged to 6 inches in diameter. Then put it onto a record turntable at 78 rpm. Stare at the near side as it sweeps through your field of view. You should see purple at the outer edge, then yellow, then bright blue near the center. Additional colors may form.
Change the speed to 45 rpm. Some colors will become brighter, some will disappear. Try at 33 rpm and most will disappear. Another method is to glue the disc to cardboard, stick a toothpick through the center, then spin it as a top. It is very interesting under fluorescent illumination.
The experiment was done originally by Gustav Theodor Fechner (German psychologist) at 300 rpm. This lower speed version was done by Roger Hayward of Scientific American, March 1971, Amateur Scientist.