1,the hint above the door says,that after first click on a random box ,you need to make a sequence of 2 actions 10 times in a row: a) click the second box to the right from the box, you clicked previously b) click the fourth box to rigth box to right from the box, where the ball appeared, when you'd done action (a) you need to count from left to right and from the top to the bottom
2. click the boxes in analogy with the example
3.lf you click the wrong box-the ball does not appear anywhere