Learn to write scripts

1. Learn JavaScript (e.g. there's a free online course at codeacademy)
2. Open in text editor an existing script for the game and try to make sense of it ( e.g.maelstrom or cncopt are a good place to start)
3. Get acquainted with Java console and try running some lines within the game
4. Try writing the script you have in mind line by line and execute in Java console

Once you get this to work, you are already better than half of the script writers in this game.