Begin in basic stance: 
Your feet are positioned directly under your hip bones, parallel to each other, and your weight is centered and distributed evenly over both soles. Your knees are slightly bent (soft), and your pelvis is tucked slightly under (pubic bone toward the navel) in the neutral position. Your ribcage is pulled up out of  your waist; your shoulder blades are pulled together and slightly down the spine. Your neck is long, in extension of your spine.

Hip shimmy:
Slightly straighten your right leg without locking your knee. This will lift your right hip up (imagine trying to push your hip up towards your armpit). Avoid any twisting or forward-and-back movement – this should remain in the vertical plane. Then slightly straighten your left leg. Repeat and increase the pace. Your upper body should remain as still and separated as possible, and your pelvis should remain tucked under in the neutral position.