When you reach Timbre Faults in Fretless, you will soon come across a Rock-On hand sign statue buried underwater in the lake. You must complete four separate puzzles, all located in Timbre Faults, to lift the statue from the water and recover the secret Pedal on the top. Here is a complete guide to all four puzzle locations to lift the Rock On statue from the lake in Fretless: The Wrath of Riffson.
Finding the Rock-on Statue

Fast travel to the Dropdee Beach, head to the clinic found at the north of the area. Here you will see a billboard with a rock statue picture. Take the path on the right to get to the elevator. It will take you to Timbre Faults.
Follow the linear path, and it will directly take you to a lake. If you look at the lake, you will find a rock-on shape statue sunk in the water. To activate it, you will need to solve four simple puzzles in the Timbre Faults.
#1st Puzzle:
Just left of the lake, you will find the first puzzle. Just move the pillar across the platform until it gets on top of the pressure switch. Pressing the button will activate the small rock-on statue next to the puzzle.
#2nd Puzzle:
From the first puzzle, head north, follow the linear route until you are in the area with the elevator on the left. Take the wooden bridge on the south, and you will find the second puzzle. Here, push the bottom pillar first, then push the pillar on the left to place it on the pressure switch.
#3rd Puzzle:

This one will take some time; you need to head to Zolio’s Camp, complete Zolio’s mission. And you will find a rope north of the camp. It will take you to a new region of Timbre Faults. Follow the linear route, and you will find yourself the route to the north is blocked by a red barrier. Defeat all three enemy points to turn off the barrier. Once it’s off, take the route left, and you will see the rock with the symbol on the ground indicating the puzzle.
Just push the left pillar block first across the track to the right, and then push the bottom pillar. Now, go back to the first pillar block on the right and push it towards the left, this will active the pressure switch.
#4th Puzzle

From the 3rd puzzle point, move to the right and then take the wooden bridge south. Follow the linear route, and it will directly take you to the boss arena. Now, take the route found south of the stairs that leads to the boss arena. In the next area, you will find the final puzzle.
Here, push the pillar at the bottom first, then push the pillar on the right. Then make your way to the first pillar and push it downward to place it on the pressure switch.
Once all four puzzles are solved, head back to the lake where we solved the first puzzle. Here you will find the Vermin Pedal. Head to the inventory, and apply the pedal to your active pedal list. Vermin Pedal: At the start of every turn, you will apply 3 status effects (Echo/ Compression/ Delay)to any random enemy in the combat.