Crossing the defences in autonomous

Is it possible to damage a defence in auto? For example, can you cross the low bar, reverse back to the neutral zone, then cross it again, to fully damage it? Or do you only get points for one crossing?

Please read section 3.1.3 of the game manual.

ROBOTS can also receive AUTO points for REACHING a DEFENSE. A DEFENSE is REACHED when, at the end of the AUTO period, any part of a ROBOT’s BUMPERS are within the opponent’s OUTER WORKS. Once a ROBOT CROSSES a DEFENSE in AUTO, any additional REACHES or CROSSES by that ROBOT during the AUTO period will not decrease DEFENSE STRENGTH nor contribute points to the ALLIANCE.