Technical data for this type of fractal : click here. For the fractal here : fn1=tan, fn2=ident, fn3=ident, fn4=ident real(p1) = 3, imag(p1) = 8, real(p2) = 0, imag(p2) = 0, real(p3) = 0.093, imag(p3) = -0.08