The lights are dimmed, the fire is blazing in the big old fireplace, your favourite tunes are on in the background, and I'm just about to pour you a big glass of red!!! Let's settle down on the big old leather sofa and have a chat!!
Just look at the little black dot without having your cursor over the picture, when the picture is just weird colors. Then, keep looking at the black dot, you move your cursor over the picture.
The moment you focus away from the dot the picture is black and white
oh I see It's tricking the brain. An illution. The brain "remembers" the colors, but once you move your eyes it "reloads" the picture and see that there are no colors