def follow_path(game_data, ship_name):
    """
    Make a ship follow a path, found by the path finding.

    Parameters
    ----------
    game_data: data of the game (dic).
    ship_name: name of the space ship (str).

    Return
    ------
    order: the order to do in order to follow the path <none|left|right|faster|slower>(str).

    Version
    -------
    Specification:  Nicolas Van Bossuyt (v1. 28/04/17)
    Implementation: Nicolas Van Bossuyt (v1. 28/04/17)
    """
    ship = game_data['ships'][ship_name]
    if len(ship['objective_path']) > 0:
        to_do_node = ship['objective_path'].pop(0)

        return to_do_node['to_do']

    return 'none'