Copper Gold and Silver

Shades ranging from copper to gold surrounding a ring of silver encircling an M4 Mandelbrot (i.e. z = z^4 + c instead of z = z^2 + c). The M4 Mandelbrot, however, is an exile as the M4 Mandelbrot formula wasn't used.

Produced using Saturn & Titan which can be downloaded from Element90 Fractals download page.