Section 1 - North End
The Reptile House North is a room with printed name "Reptile House (North)". "You are in long curving room; almost a corridor, in fact. It curves around to the west and to the south. The inner of the two walls is made up of a series of tanks, each of which contains stones, vegetation, heat lamps and so on. Everything to keep a reptile happy. What you don’t see are many actual reptiles − presumably they have hidden themselves away to sleep. The tank in front of which you now stand, though, is an exception." It is covered.
The reptile house in-door is a door. "[if the location is the back side of the reptile house in-door]There is also a bridge to the east over the river, leading to an even larger building decorated with pictures of reptiles. The door to the building, which arcs away to the south, is [end if][if the location is the back side of the reptile house in-door and the reptile house in-door is closed]closed[otherwise if the location is the back side of the reptile house in-door and the reptile house in-door is open]open[otherwise if the reptile house in-door is closed]A door leading out of the reptile house lies closed to the west[otherwise]A door leading out of the reptile house lies open to the west[end if]." It is openable and closed. It is west of the Reptile House North and east of the Riverside.
[The door needs to be listed last]
Rule for choosing notable locale objects for the Reptile House North:
repeat with item running through things in the Reptile House North:
if the item is a door:
set the locale priority of the item to 6;
otherwise:
set the locale priority of the item to 5.
The tanks are backdrop with description "The tanks are hard to examine in the dim light, but you imagine the reptiles would find them comfortable." The tanks are in the Reptile House North. Understand "stones" as the tanks. Understand "vegetation" as the tanks. Understand "heat lamps" as the tanks.
A transparent container called the lizard tank is in the Reptile House North. "Lying on a stone within this beautifully rendered lizard tank is a bright red gecko." The description of the lizard tank is "The tank is full of the usual accoutrements for keeping small reptiles happy and comfortable. The front glass panel is hinged to one side with a lock embedded on the other." It is fixed in place, lockable and locked. The green key unlocks the lizard tank.
Mo the Gecko is a female animal. "Mo the Gecko has red colouration, bright eyes and tiny, sharp-looking teeth." She is in the lizard tank. She is undescribed.
Instead of touching Mo the Gecko:
say "You lean forward to nudge Mo with your nose. Her head whips round, jaws gaping, and before you know it you are being scoured by a torrent of tiny little angle brackets. The stinging is too much and you back away. Perhaps you should leave her be."
After going south from the Reptile House North:
increase the time of day by three minutes;
continue the action.
Instead of going nowhere in the Reptile House North when the noun is outside:
try going west.