def METHOD_NAME():
    global cell
    L = 4.
    cell = pbcgto.Cell()
    cell.verbose = 0
    cell.a = np.eye(3)*L
    cell.atom =[['He' , ( L/2+0., L/2+0. ,   L/2+1.)],]
    cell.basis = {'He': [[0, (4.0, 1.0)], [0, (1.0, 1.0)]]}
    cell.build()