Singing Stones

2% and when you figure out the order you get a purple gem stone. I can tell you the 3rd stone and last stone gets tapped twice and 2 stones dont get used. Best way for me to figure out the order was place then all in an open space and a tap one the check the homer icon each time. If you get it right it will progress up and if you mess up. It resets back to 0. Every time I got one right I moved the stones in order so I wouldnt forget.