Many different parameters can be varied, like spiral size, spiral slope, random mixes, space dependence of parameters, strict/non-strict overlaps, resulting in many different variations (see comments when clicking on images). Also an opportunity to play with my new AxiDraw.
Attached spirals of the same sizeAttached spirals of the same sizeAttached spirals of the same size but with varying slopesmixing sizes with same slopemixing sizes and slopesmixing sizes, fitting into circle shapefitting also inside existing spirals, leave freedom while fillingdense packing fillsdense packing fillsdense packing fills with larger slopedo not avoid overlapsdo not avoid overlapsdo not avoid overlapsdo not avoid overlapsexperiment with spatial size dependenceexperiment with spatial size dependenceprefer certain relative points for branchingprefer certain relative points for branchingprefer certain relative points for branchingprefer certain relative points for branchingprefer certain relative points for branchingprefer certain relative points for branchingprefer certain relative points for branching"metaspiral" - fill spiral pattern with spirals"metaspiral" - fill spiral pattern with spirals"metaspiral" - express spiral pattern with spatial size dependence"metaspiral" - express spiral pattern with spatial size dependence"metaspiral" - express spiral pattern with spatial slope dependence