You can assume that you are an intrepid
explorer, searching for buried treasure. Specifically, you are underground, wandering through a
series of very dark tunnels. You have no light and no signs to guide your way. All you can do is
blindly feel around and wander through the tunnels until you hopefully enter the room that
contains the treasure. You can, however, leave a trail of breadcrumbs behind you so that if you
come to the end of a tunnel and you can’t go any further, you can get back to where you were and
try again in another direction.