Stare at the red dot in the center of the flag image for 30-60 seconds then look at the center of the white spot below or any white surface in the area.
Why did you see a red, white and blue American flag? Those colors are the negative of the above black, blue and yellow image. The negative is what is left after you stop staring at the image. If you were to take the above image and select negative from the effects menu you would have a nice bright American flag. Isnt it interesting …..