this can be viewed on paint or powerpoint or some other
American slide show program.
Step 1: The Pic
as an after image.
simple pics work best
Step 2: Getting It Ready
then invert the colours. (ctrl i)
Step 3: The After Image
then save that as something else.
Step 4: Watching It.
the bext slide.
tell viewer to stare at dot for 20-30 sec then go next slide.
you should see normal pic.
if you don't have a slide show viewer go to dot pic, press ctrl a then ctrl c.
then got to inverted pic and stare at dot for 20-30 sec then press ctrl v.
hope you enjoy