When you coil a garden hose you see a linear spiral. It has the same distance between each revolution. But living things tend to produce nonlinear spirals, which increase the distance between each revolution. This simple scaling pattern permits organisms to grow while retaining a similar shape. Try changing the spiral's form by editing the seed shape. The stem is a passive green line, and the "growing tip" is a self-replicating red line. This is common in living things: a growing edge leaves behind dead cells (the inner tree trunk or "heartwood") or minerals (shell of snails), providing a strong, protective structure.