1. Go
Put your feet together first, and then separate them by 5 cm.
Stand on tiptoe with your right foot
2. Put your right foot on your toes and focus on your right foot. The left foot feels free to move. At this time, the left foot must be moved backwards, and the left foot should be straight.
3. The left foot moves backward, the left foot quickly stands on tiptoe, and the right foot is flat, which is equivalent to the starting action.
4. Focus on your left foot, translate your right foot backwards and keep it straight.
5. Repeat step 1-4, so that you can see the effect.