Step by step instructions
Stand on right leg, left leg extended out to the side slightly in front of body (aim to the front corner of the room), foot flexed, with hands behind head.
Open leg out to the side and in line with hip, lifting leg slightly higher as it opens. Bring leg behind body (aiming to the back corner of the room) without letting foot touch the floor, then lift and open side to return to the starting position. (Imagine tracing a rainbow shape with heel.) Do all reps on the right, and then repeat on opposite side to complete the set.