Simple IFS Fractals composed of spirals.

(The quality of the rendered line is not that great — the generated output was bitmap instead of vector. I used the built-in REALbasic class which only used an integer coordinates system at the time (part of the API has since been updated) and I had not yet written the SuperGraphics framework for REALbasic.)

Depth = 4

Depth = 5

Depth = 6