sooo cool!!!

first comment i think!

Woah! Weird!

It's a amazing illusion, I had to comprobe it pasting a screenshot on Paint

when you click add/remove can´t it just switch the animation?

The issue is that your brain is looking at contrast to the surrounding circle, rather than absolute color. When watching it with the surroundings turned on, say "light" and "dark" to yourself at the right times and you'll see that the center dots do alternate together.

Wow, thats really effective, ive never seen an animated one before.
hard to believe, but true.
aint our brains wierd!

well that was cool...i am comment number 7! :) lucky number 7! Everyone leave a comment and see how many we can get...by the way the optical illusion was AWESOME! :P

Like like WHOA!!

The correct link to the shapirolab page is www.shapirolab.net .

i don't believe it.
i can't get it to happen where they change on the same time. id like to see this slowed down. so you can see the changes in the originals you know?

Indeed we look for contrast and when we can actually see the small circles. Don't think of it in the way "When one circle appears the other disappears", think of it in the way "When one circle has a contrast against white (a.k.a. black), the other circle becomes black"

Lucky 11! Just my age! Keep those comments coming people!

If you don't believe it, try blocking out the borders with your fingers so you can only see the centres. You can see they both change together!

It takes ALOT to make me post now, but this was SOOO kool!!!!

p.s., annonomis w/ fingers, you took my age spot. Oh, whatever, my birthday is next week.

Punch a couple of holes into a piece of paper and place over the flashing image on screen to mask out the surrounding circle.
This proves that the button is not rigging the animation.

One of the most effective optical illusions I have seen, very clever.

that's cool!

Whoa that's so weird!!!

by far one of my favorites!!!!

This is soooo cool!!!

cool... and that vampire video on the right, kinda looks like Miley Cyrus!! or maybe I'm wrong

if you put your fingers around it you dont have to add/remove the surrounds


jus thought you might want to know

these kinds of things are always cool to look at! i love it!

i did it without using the button...just focus on one of the centre circles n after a few seconds both of them appeared to flash at the same time

Funkadelic!

You can also do a Print Screen and paste the result into an image editor or word to see that the images are flashing together.

wow i guess it waas really cool the thing is that they are the same collor and siz but when they are blinking with the exteriour disk u think that its not because you the balk blends in the black and the same with the wite

Wow. I'M BACK! This was an awesome illusion. I love it.