Description* DON'T PUT the explanation to this trick in the comments - let others to have fun!
The illusion presented in this app is pretty simple but it still can trick your mind :D
This is really good example of how magicians are able to fool us. Share it with your family and friends and see if they will fall for this.
* THIS IS NOT a game - just follow on-screen instructions.
PLEASE: if you figure out how this trick works Please do not put the solution in comments - allow other users to have a fun too!