def do(actor, targets)
    return if targets.empty?
    actor.vector.pitch = Utility.find_angle(actor.location, random_target(targets).location)
  end
def do(actor, targets)
    return if targets.empty?
    actor.vector.pitch = Utility.find_angle(actor.location, random_target(targets).location)
  end
Set the actor's heading to point directly at first target.