Update README.md

README.md

@@ -9,10 +9,20 @@ The idea and some of the code for this module was inspired by
 via [Allen Downey](https://github.com/allendowney)'s book
 _Think Python, Third Edition_ (O'Reilly, 2024).
 
+Atam's best idea was to use SVG for drawing, which makes the
+code simple and lightweight, requiring no special dependencies
+besides the `ipython` module that is always available in Jupyter.
+
 This is a rewrite from scratch, using classes to model the turtle
 and the drawing—to make it easier to test, maintain and evolve by
 avoiding global variables to keep program state.
 
+I created a fork—[jupyturtle2](https://github.com/fluentpython/jupyturtle2)—which
+uses `ipycanvas` to draw on an HTML canvas, instead of generating SVG.
+`ipycanvas` requires the binary dependencies `numpy` and `pillow`,
+so it may be harder to deploy in some environments.
+`jupyturtle2` is better than `jupyturtle` in some respects, but worse in others.
+
 I used metaprogramming techniques to build the procedural API
 with global functions like `fd()` to move the turtle.
 The techniques are easier to understand in the didactic project