The scheme used here is a 4x4 block (the minimum required to accomodate all pieces) and rotations by 90 degrees. You can rotate both cw and ccw, this works for

The scheme used here is a 4x4 block (the minimum required to accomodate all pieces) and rotations by 90 degrees. You can rotate both cw and ccw, this works for undoing rotation of all pieces.