Hunters and Prey - archers move

I don’t think I’m fully learning the lesson here. I passed the level but my archers still move some. Are they supposed to not move at all?

for archers [array]:
    enemy = 
    command archers not to move using archer.pos (which comes up in the help)
    if enemy:

I’ve put the command archers after ‘if enemy’ as well and they still moved the same. They are not moving far enough that an ogre comes up from behind but I’m wondering if they are supposed to hold their position and not move at all? Am I supposed to use a more complicated method to get them to remain in their position? (not that I know any complicated methods)

It’s fine. The archers can move.