Action Queuing
version 3 by Jesse McGrew
Provides a way to store actions for NPCs to perform in order. The included example has two movers following pre-planned routes to bring items in from a truck, each waiting when they need to put something on a surface the other is carrying. (Not compatible with 5T18, but not necessary either; we leave it on the website for those still using older versions of Inform.)
You can do three things here: