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Autre version ici

from kandinsky import set_pixel
from math import *
from random import random

for n in range(223):
  for m in range(320):
    x,y,z,u,v = 0,0,-.8,(m-159.9)/160,(.8*n-85.9)/111
    w = 1/sqrt(u*u+v*v+1)
    u *= w
    v *= w
    i = copysign(1, u)
    k = 1
    while k !=0:
      k,e,f = 0, x-i,y-i
      p = u*e+v*f+w*z
      d = p*p-e*e-f*f-z*z+1
      if d > 0:
        t = -p-sqrt(d)
        if t > 0:
          k = 1
          x += t*u
          y += t*v
          z += t*w
          e,f,p = x-i,y-i,1.3*(u*e+v*f+w*z)
          u -= p*e
          v -= p*f
          w -= p*z
          i = -i
    cc = max(0,min(255,20*int(12*w-7*v-5*u+random())))
    set_pixel(m, 222-n, (cc,)*3)