The best way to learn how to use a parenthetical correctly is to see examples from produced scripts. In this scene from “The Social Network,” written by Aaron Sorkin, Mark Zuckerberg and his ...

put any sound effects for your play like this. Example: Cogs whirring. CHARACTER: Character names appear in capitals with a colon on the left. The name must stay the same throughout the script.

The winning script will be turned into an actual sketch for the Horrible Histories TV show! Here is an example of a sketch with the original script to give you an idea of how to format yours.