To use Terminal simply type in a command.To get a list of commands type help.The commands are : help,exit and shutdown.Shift-click the green flag to enter Turbo Mode for increased speed in Terminal.
Notes: I have always wanted to create an operating system.So I decided to make one on Scratch 2.0. This is version 0.2 New feature:Command-line Terminal See version 0.3 here: http://beta.scratch.mit.edu/projects/10096964/