Create a script

Scripts don't have any special requirements. To make one, simply select the corresponding type in the dropdown.

And that's it, that's the entire set of requirements for a basic frontend or backend script. This script can then be run at will using the execute button in the UI. If you want to make any changes to the script, you put them right there in the note using the CodeMirror code editor. The changes are saved automatically and you can re-run with the button as many times as you need while you work.