Are you talking about the stones going across the water after the wall puzzles.
If so, start by picking the stone right in front of you & then go right, left, right,
left across the water to the other side.
If you are talking about the door maze at the other side of the water, then you
have to start at the bottom & continue to click on different squares to change all
of them from red to grey. It will work. Just be patient & try clicking on the same
square twice to watch how it changes the squares above & below it. Keep on
trying & eventually you will see a pattern from bottom to top & then side to side.
I hope this helps you somewhat. Good Luck & most of all have fun.
There are many more puzzles & mysteries to solve ahead.....