code: def create_cube():
      cube_tri = np.array(
          [
              [0, 6, 4],
              [0, 2, 6],
              [0, 3, 2],
              [0, 1, 3],
              [2, 7, 6],
              [2, 3, 7],
              [4, 6, 7],
              [4, 7, 5],
              [0, 4, 5],
              [0, 5, 1],
              [1, 5, 7],
              [1, 7, 3],
          ]
      )
      cube_vts = np.array(
          [
              [0.0, 0.0, 0.0],
              [0.0, 0.0, 1.0],
              [0.0, 1.0, 0.0],
              [0.0, 1.0, 1.0],
              [1.0, 0.0, 0.0],
              [1.0, 0.0, 1.0],
              [1.0, 1.0, 0.0],
              [1.0, 1.0, 1.0],
          ]
      )
      return cube_tri, cube_vts
  
imports: import numpy
  import numpy.testing
  from dipy.tracking.mesh import triangles_area, random_coordinates_from_surface, seeds_from_surface_coordinates, vertices_to_triangles_values
label_desc: Use image node_id 1 for calling a global function with example usage: create_cube() and returns: cube_tri,  cube_vts