When line is not crossed by other line is green,otherwise it's red.
It's good brain trainder.maike.tt
1. To start, the game will show you which cup has one blue ball.
2. Then they will shuffle the cups. Keep your eyes and focusing on the correct cup.
3. When the game stops shuffling, make your guess and pick the right cup.
If you find out the correct cup, then you will go to the next level. If not, the game is over.