Look Back Rule ???

[3afan]

Question about the look back rule on a walk:

Ball 4 on the batter ... if the pitcher has the ball in the circle can the batter-runner ...

(1) round first base, stop, and then go back to first? [or if she rounds, then stops, does that violate the look back rule?]

(2) if she rounds first base and hesitates, but does not completely stop, then continues on the 2nd base is that a violation?

(3) or are her only 2 options a) stay on first or b) go to 2nd base without stopping?

thanks ...