Found in Chapter 4 at the Axe Fort. Follow the moves shown in the video:
Trial 01 : Up, Up, Right, Left, Up, Down, Up, Left, Up
Trial 02 : Up, Right, Left, Up, Left, Up, Left, Up, Right, Up
Trial 03 : Up, Up, Down, Up x5, Down, Right, Down, Up, Right, Right, Up, Left, Up