가운데에 있는 + 에 집중해 보세요.
그러다 보면 점점 분홍점이 사라져 간답니다.
단 시선을 꼭 + 에 집중해야 빨리 사라진답니다.
눈도 되도록 적게 깜박거리시구요.
분홍은 사라져 가도 초록점은 돕니다

If your eyes follow the movement of the rotating pink dot, you will only see one color, pink. If you stare at the black + in the center, the moving dot turns to green. Now, concentrate on the black + in the center of the picture. After a short period of time, all the pink dots will slowly disappear, and you will only see a green dot rotating if you're lucky! It's amazing how our brain works. There really is no green dot, and the pink ones really don't disappear. This should be proof enough, we don't always see what we think we see.