Explanation:

1. Position your feet next to each other;
2. Make 1 step forward and back with one foot at a time;
3. Then step to the right and back in the same way;
4. Then step back and forth in the same way;
5. Then step to the left and back in the same way;
6. Keep moving continuously on your forefeet throughout the exercise;
7. Repeat this movement at a fast pace.