Some Optical illusion Game~

There are two pictures here~ one with windows and balloons on it and the other with butterflys on it~ Take a good look at both of it~ Try to focus~ If your Lucky enough, at the first picture, you will see five windows instead of four. At the second picture, try to focus really hard~ If you could do so, you'll get to see a large 3D butterfly floting out from the middle part~ It takes time~(!remember to click it to enlarge it in order to see the whole picture!) Funny right? This is what we called optical illusion~ Anyway, Don't over do it if you really can't see anything~ Over doing it will only damage your eyes~