``` self.points_matrx = list() self.one_corner = [0.0, 0.0, 0.0, 0.0, 0.0] self.another_corner = [0.0, 0.0, 0.0, 0.0, 0.0] self.points_matrix.append(self.one_corner) self.points_matrix.append(self.another_corner)