add recursion example

Add the typical Logo recursion example of a stick -> tree. Remember that you should "stop the recursion" (that is, have a no-op base case) when the size gets too small.

For fun, also try and make it brown and green!

Start by locating the repository's existing Logo examples and the entry point used to run them. Add a stick-to-tree recursion example with a no-op base case when the size becomes too small, and try brown and green coloring. Done means the example runs without unbounded recursion and produces the requested tree.

Written by the indexing model from the issue text.