A bidimensional pseudo-random walk defined by means of the Champernowne number -using all base 10 prime numbers-: 0.2 3 5 7 11 13 17 19 23 29 31... -288.982 digits, base 10- [Une pseudo-marche aléatoire bidimensionnelle définie à l'aide du nombre de Champernowne -utilisant tous les nombres premiers en base 10-: 0.2 3 5 7 11 13 17 19 23 29 31... -288.982, base 10-].
RHO = constant THETA = 2.pi.N/10'THETA' being an absolute angle. At last, the square root of the distance from each point to the origin is taken.