[issue41380] Add snake example to turtledemo

[Ehsonjon Gadoev]

Ehsonjon Gadoev <ehsonjonazimi05 at gmail.com> added the comment:

@gvanrossum, Can you merge my pull requests?

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components:  -Library (Lib)
nosy:  -epaine, gregorlingl, terry.reedy, willingc
type: enhancement -> 
versions:  -Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41380>
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