In your other thread, I asked you what is "self-scripting"? I'll guess that it means writing a script in the language of the shell---eg BASH
More generally, a scripting language is one that is not compiled, but interprets and executes each commands as it appears in the script. Examples include Python, Perl, and PHP.
Which is the best and easy to write scripting?
Best: Get a book and start writing scripts---eg the Bash Guide for Beginners at http://tldp.org
Easy: If you want to become really good at scripting for system administration, "easy" is not a word that would occur to me. More generally, things really worth doing are seldom easy.