Commands :

1. Move N units : forward X, X can be negative
2. Rotate in XZ : rotate X Angle. Defaults to right turns. Can be turned left if X is replaced with -X or angle is negative.
3. Rotate in XY : rotate Y Angle. Defaults to right turns. Can be turned left if Y is replaced with -Y or angle is negative. // Note Rotation along YZ is not supported as it would be functionally similar to other two since there is symmetry along one axis.
4. Lift pen: up
5. Put down pen: down
6. Repeat Sequence : repeat (Count) , [Sequence,] . Repeat a series of actions for n counts. Actions are separated by a comma (,).
7. Curve(Angle, Radius) : This can be accomplished using a suitable Repeat Command. So, repeat 32, forward 3, rotate X 11.25 would create a circle (not made of smooth splines arguably, but still)
8. Recurse (Start) (Intervals), [Sequence,] : Recurse on a sequence. Regrettably, this is a hack at best and isn’t perfect. While it works, results are not as intended and there is still work required to draw figures like trees/leaves.

If running on local machine, some sort of server is required. I did this using IIS on windows, but suitable easy alternatives could be in

python3 -m http.server

(See this Mozilla page for more).

This is due to CORS requirements where pages (local or otherwise) can't access local files that aren't in their own directory (at least without flipping a few flags). When running a server, root should always be where the index file is or a folder containing the index.html file, otherwise CORS and loading issues will persist.