Try your hands on AutoLISP coding. Dive straight away.
Code is on GitHub at the URL given in the first comment.
Source codes for all subsequent hands on practice tutorials will reside on separate branch of this repository.
You can use git command line utility for cloning just one branch.
Command for this is this given in the first comment of this video.
This is the first version of a code , that is written by some surveyor for helping him in the job of counting trees in some plot boundary. This will touch AutoLisp functions like entget , ssget , entsel , vl-remove-if-not.
In the next video lecture , this code will be made more robust and more functionalities will be added.