The only point we need to be careful about is that the carousel is simulated twice over, in the following text: once in the built-in way that objects are inside other objects, so that the luggage items are objects contained in the carousel object; but then again by the "circle of misery" list, a ring buffer keeping track of what order things are in. We need to be careful that these two records do not fall out of synchrony: anything put into the carousel must be added to the list, anything taken out must be removed. (In fact we forbid things to be added, for simplicity's sake.)
{*}"Circle Of Misery"
Luggage item is a kind of thing. The blue golf bag, the leopardskin suitcase, the green rucksack and the Lufthansa shoulder-bag are luggage items.
Heathrow Baggage Claim is a room. The carousel is a container in Heathrow. "The luggage carousel, a scaly rubbered ring, does for the roundabout what Heathrow Airport does for the dream of flight: that is, turns the purest magic into the essence of boredom, only with extra stress. [if the number of entries in the circle of misery is 0]For once it stands idle. Perhaps it's broken.[otherwise]The baggage approaching you now: [the circle of misery with indefinite articles]."
add the list of luggage items to the circle of misery.
The list "circle of misery" is our ring, in which entry 1 is considered to be the position of whichever bag is currently frontmost. And here it goes, round and round:
{**}Every turn when the number of entries in the circle of misery is not 0:
rotate the circle of misery;
let the bag be entry 1 of the circle of misery;
say "The carousel trundles on, bringing [a bag] to within reach."
Instead of inserting something into the carousel, say "In recent years, the authorities have tended to frown upon depositing bags in random places at airports."
