The graphic part was done in NodeBox 3, an open source application for generative design (and much more).
The engraving part was done on a cnc cutter (Trotec - Speedy 100) at Fab Lab Genk (thx a lot Danny!).
I tried out a few on wood before engaging in the stone cutting.
Some stone types were not as good as others, lots had to do with the density. The cnc cutter was set to engraving.
Step 1: Drawing the centipede.
The centipede was made by using mainly core nodes and functionality. The math behind the skeleton was done over an additional python file that renders Voronoi segmentation. The skeleton itself is the medial axis path derived from that segmentation. NodeBox allows you to add bits of code to the system.
The generative principle allows to produce an infinite amount of different centipedes.