def METHOD_NAME(self, points, steps):
    """
    Follow a path pre-defined by a set of at least 4 points.  This Path will
    interpolate the points into a curve and follow that curve.
    :param points: The list of points that defines the path.
    :param steps: The number of steps to take to follow the path.
    """
    # Spline interpolation needs a before and after point for the curve.
    # Duplicate the first and last points to handle this.  We also need
    # to move from the current position to the first specified point.
    points.insert(0, (self._rec_x, self._rec_y))
    points.insert(0, (self._rec_x, self._rec_y))
    points.append(points[-1])
    # Convert the points into an interpolated set of more detailed points.
    steps_per_spline = steps // (len(points) - 3)
    for j in range(1, len(points) - 2):
        for t in range(1, steps_per_spline + 1):
            y = _spline(float(t) / steps_per_spline,
                        float(points[j - 1][1]),
                        float(points[j][1]),
                        float(points[j + 1][1]),
                        float(points[j + 2][1]))
            x = int(points[j][0] + ((points[j + 1][0] - points[j][0]) *
                                    float(t) / steps_per_spline))
            self._add_step((x, int(y)))