Turtle moves on the screen while drawing lines; it is a very simple concept, but you can draw various shapes with just a few commands. I have summarized a sample from the official Python documentation ...

Some animals carry patterns so precise and mathematically exact that scientists struggle to explain how nature produced them ...

This file provides functions and modules that construct shapes from a list of cross sections. In the case of skin() you specify each cross sectional shape yourself, and the number of points can vary.

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