Ah, Of course. I thought it would be something simple like this, but it was very late when I was finishing the packaging.
Thanks!
Anyway, yes it's the desired effect, and it's completely useless. What you see here is so called Lorentz Attractor which is one
of the very interesting selfsimilar set being part of the Theory of Nonlinear Dynamic systems (former and better known as a theory
of chaos). This set is defined by three trivial differential equations which looks as follows:
dx/dt = sigma (y-x)
dy/dt = rho x - y - xz
dz/dt = xy - beta z
I am using only X/Z projection which achieves the desired effect of "butterfly wings". Funny thing about this atractor is that
it's a way how to display infinity on the finite space. If you watched the progression of those two wings you would see that it never repeats. If we had infinitely good resolution we would see that it gets more filled each elipse.
Well enough of physics, enjoy...