'Called by tutorial world runner, or whenever someone successfully
traversed the Exit.'

def reset(self):

    self.location.msg_contents('The    secret    door    closes    abruptly,    roots    falling    back    into    place.')
    self.db.button_exposed = False
    self.db.exit_open = False
    self.destination = None
    start_pos = [{'yellow': 1, 'green': 0, 'red': 0, 'blue': 0}, {'yellow': 0, 'green': 0, 'red': 0, 'blue': 0}, {'yellow': 0, 'green': 1, 'red': (-1), 'blue': 0}, {'yellow': 1, 'green': 0, 'red': 0, 'blue': 0}, {'yellow': 0, 'green': 0, 'red': 0, 'blue': 1}]
    self.db.root_pos = random.choice(start_pos)
