siegel disk fractal
Assuming "siegel disk fractal" is referring to dynamical systems | Use as instead

Input information

Julia set | 
Re(c) | -0.390541
Im(c) | -0.586788

Iteration rule

z_(n + 1) = z_n^2 + c | z_0 = z
(the Julia set is the boundary of the set of z element C for which the orbit of z_n is bounded)