Setting up a scripting environment
While technically you can use any text editor to write lua scripts for utilitybelt, the recommended setup instructions are for Visual Studio Code. The benefits of using the setup below is that it is documented, has debugger support, and will eventually support autocompletion / inline documentation while editing scripts.
Install Visual Studio Code
Download and run the installer from Visual Studio Code.
Install Lua language server for Visual Studio Code
Install the Lua language server extension from the visual studio marketplace.