Groove the flip-flap. Push it out with the outside foot, snap it back with the inside of the same foot, and drive away to finish, with the technique clean before a defender is added.
As the base, but no defender. Emphasise the outside push and the inside snap-back with the same foot, keeping it close, and a clear change of pace. Both feet. Rotate through.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.