This is really weird cause in one point of view you can see some circles and in the mirror you can see rectangles. These types of optical illusion are made with some strange forms as you can see at 0:15. The guy who made this illusion is SUGIHARA Kokichi who is Professor at Meiji University, Japan. I would liked to make some cool stuffs like this when I was a student. Instead, the best thing I did was to separate proteins from each other on a paper or to grow some bacterias in petri dish.