Focus on the red dot and the blue circle will disappear.
Found this using stumbleupon and searching for puzzles, which I do semi-regularly.
It’s a good illustration of the benefits of proper focus. Surroundings become eliminated with focus.
2,805 notes
Leave Note / Reblog
focus
SO COOL! I dunno how it works, but it does!
focus on the red dot.
Focus and the rest will disappear.