'''For example:'''
{| border="1" cellpadding="2" align="center" |-| width="15pt" | A | width="15pt" | B | width="15pt" | C<br>|-| D || E || F<br> |-| G || H || I<br>|}
If the player stands on "E" and faces "G" while they're attaching the last piece of the guard tower, the door of the tower will face "H".