code: def on_for_distance(self, speed, distance_mm, brake=True, block=True):
          
          rotations = distance_mm / self.wheel.circumference_mm
          log.debug("%s: on_for_rotations distance_mm %s, rotations %s, speed %s" % (self, distance_mm, rotations, speed))
  
          MoveTank.on_for_rotations(self, speed, speed, rotations, brake, block)
docs: Drive distance_mm