How to use the desert.bzspl function in desert

[(0.15, 0.25),
                  (0.35, 0.45),
                  (0.55, 0.65)]], 2)]).show()

    draw([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)]], 2)]).show()

    draw([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)],
                 [(0.35, 0.25),
                  (0.85, 0.35),
                  (0.35, 0.95)]], 2)]).show()

    draw([bzspl([[(0.1, 0.2),
                  (0.4, 0.25),
                  (0.9, 0.15),
                  (0.9, 0.3),
                  (0.95, 0.45),
                  (0.8, 0.9),
                  (0.1, 0.87)]], 2, closed=True)]).show()

    draw([bzspl([[(0.15, 0.2),
                  (0.45, 0.25),
                  (0.95, 0.15),
                  (0.95, 0.3),
                  (0.98, 0.45),
                  (0.85, 0.9),
                  (0.15, 0.87)]], 2)]).show()

    desert.set_fg(rgb(1, 0, 1, 1))

pprint(r)
  pprint(Rgba.from_json(r).json())
  pprint()

  b = bzspl([[(0.1, 0.2),
              (0.4, 0.25),
              (0.9, 0.15),
              (0.9, 0.3),
              (0.95, 0.45),
              (0.8, 0.9)]], 2, closed=True).json()

  pprint(b)
  pprint(bzspl.from_json(b).json())
  pprint()

  b2 = bzspl([[(0.1, 0.2),
               (0.3, 0.4),
               (0.5, 0.6)],
              [(0.15, 0.25),
               (0.35, 0.45),
               (0.55, 0.65)]], 2).json()

  pprint(b2)
  pprint(bzspl.from_json(b2).json())
  pprint()

noise = 0.00005
    spl = []

    for _ in range(20):
      a = sorted(random(num)*TWOPI)
      spl.append(0.5 + column_stack((cos(a), sin(a)))*rad)

    res = []
    for i in range(1, 4000000):
      for xy in spl:
        n = xy.shape[0]
        xy += in_circle(n, 0, 0, 1)*reshape(arange(n), (n, 1))*noise
        res.append(xy.copy())

      if not i%400:
        c.draw([bzspl(res, density, noise=0.001)]).show(gamma=1.5)
        res = []
      if not i%(400*20):
        c.save(filename(arg), gamma=1.5)

(0.9, 0.3),
                  (0.95, 0.45),
                  (0.8, 0.9),
                  (0.1, 0.87)]], 2, closed=True)])

    send([bzspl([[(0.15, 0.2),
                  (0.45, 0.25),
                  (0.95, 0.15),
                  (0.95, 0.3),
                  (0.98, 0.45),
                  (0.85, 0.9),
                  (0.15, 0.87)]], 2)])

    erosion.set_fg(rgb(1, 0, 1, 1))

    send([bzspl([[(0.5, 0.1),
                  (0.3, 0.2),
                  (0.1, 0.3),
                  (0.4, 0.3),
                  (0.95, 0.45),
                  (0.8, 0.9),
                  (0.1, 0.87)]], 2)]).save()

pprint()

  c = circle(0.05, ((0.5, 0.4), (0.8, 0.4)), 1.0)\
      .rgb([
          black(0.3),
          black(0.1)]).json()
  pprint(c)
  pprint(circle.from_json(c).json())
  pprint()

  r = rgb(0.1, 0.4, 0.3, 0.99).json()
  pprint(r)
  pprint(Rgba.from_json(r).json())
  pprint()

  b = bzspl([[(0.1, 0.2),
              (0.4, 0.25),
              (0.9, 0.15),
              (0.9, 0.3),
              (0.95, 0.45),
              (0.8, 0.9)]], 2, closed=True).json()

  pprint(b)
  pprint(bzspl.from_json(b).json())
  pprint()

  b2 = bzspl([[(0.1, 0.2),
               (0.3, 0.4),
               (0.5, 0.6)],
              [(0.15, 0.25),
               (0.35, 0.45),
               (0.55, 0.65)]], 2).json()

[(0.15, 0.25),
                  (0.35, 0.45),
                  (0.55, 0.65)]], 2)])

    send([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)]], 2)])

    send([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)],
                 [(0.35, 0.25),
                  (0.85, 0.35),
                  (0.35, 0.95)]], 2)])

    send([bzspl([[(0.1, 0.2),
                  (0.4, 0.25),
                  (0.9, 0.15),
                  (0.9, 0.3),
                  (0.95, 0.45),
                  (0.8, 0.9),
                  (0.1, 0.87)]], 2, closed=True)])

    send([bzspl([[(0.15, 0.2),
                  (0.45, 0.25),
                  (0.95, 0.15),
                  (0.95, 0.3),
                  (0.98, 0.45),
                  (0.85, 0.9),
                  (0.15, 0.87)]], 2)])

    erosion.set_fg(rgb(1, 0, 1, 1))

(0.9, 0.2),
                        (0.9, 0.25),
                        (0.9, 0.3)), 2)\
          .rgb([rgb(0.2, 0.2, 0.9, 0.3),
                rgb(0.9, 0.2, 0.2, 0.3),
                rgb(0.2, 0.9, 0.2, 0.3),
                rgb(0.9, 0.9, 0.2, 0.3),
                rgb(0.2, 0.9, 0.9, 0.3)]),
          circle(0.05, ((0.85, 0.1),
                        (0.85, 0.3)), 2)\
          .rgb([rgb(0.5, 0.2, 0.9, 0.3),
                rgb(0.9, 0.5, 0.2, 0.3)])]).show()

    desert.set_fg(black())

    draw([bzspl([[(0.1, 0.2),
                  (0.3, 0.4),
                  (0.5, 0.6)],
                 [(0.15, 0.25),
                  (0.35, 0.45),
                  (0.55, 0.65)]], 2)]).show()

    draw([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)]], 2)]).show()

    draw([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)],
                 [(0.35, 0.25),
                  (0.85, 0.35),
                  (0.35, 0.95)]], 2)]).show()

rgb(0.2, 0.9, 0.9, 0.3)]),
          circle(0.05, ((0.85, 0.1),
                        (0.85, 0.3)), 2)\
          .rgb([rgb(0.5, 0.2, 0.9, 0.3),
                rgb(0.9, 0.5, 0.2, 0.3)])])

    erosion.set_fg(black())

    send([bzspl([[(0.1, 0.2),
                  (0.3, 0.4),
                  (0.5, 0.6)],
                 [(0.15, 0.25),
                  (0.35, 0.45),
                  (0.55, 0.65)]], 2)])

    send([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)]], 2)])

    send([bzspl([[(0.1, 0.2),
                  (0.8, 0.3),
                  (0.3, 0.9)],
                 [(0.35, 0.25),
                  (0.85, 0.35),
                  (0.35, 0.95)]], 2)])

    send([bzspl([[(0.1, 0.2),
                  (0.4, 0.25),
                  (0.9, 0.15),
                  (0.9, 0.3),
                  (0.95, 0.45),
                  (0.8, 0.9),