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      ┌─────→ Input
      │         ↓
    Wait      Check ←─*── Wait
      ↑         ↓          ↑
      │      Lead-in ─→ Add time
      │        ²↓    ¹
  Add time  Carry out
      ↑         ↓
      └───── Recovery

* Leading back to the check ensures
  continued legality if world changes.

Every person has a stored action called the pending action.

The seconds are a number that varies. The seconds are 0.

Every person has a stored action called the pending action.
Every person has a number called the wait timer.
Every person has a truth state called the preparation toggle.

This is the time progression rule:
   while the wait timer of the player is not 0 or the preparation toggle of the player is not false:
      repeat with the character considered running through people:
         unless the wait timer of the character considered is 0:
            decrement the wait timer of the character considered;
         if the wait timer of the character considered is 0:
            if the preparation toggle of the character considered is true:
               now the preparation toggle of the character considered is false;
               try the pending action of the character considered;
               now the pending action of the character considered is the action of waiting;
      increment the seconds;
      if the seconds are 60:
         now the seconds are 0;
         increment the time of day;
         abide by the timed events rule.
The time progression rule is listed instead of the advance time rule in the turn sequence rules.
The timed events rule is not listed in the turn sequence rules.

The prepare rules are a rulebook in the specific action-processing rulebook.
A specific action-processing rule (this is the prepare stage rule):
   if the preparation toggle of the actor is false:
      now the preparation toggle of the actor is true;
      now the pending action of the actor is the current action;
      abide by the prepare rules.
The prepare stage rule is listed before the carry out stage rule in the specific action-processing rulebook.

This is the time progression rule:
   while the wait timer of the player is not 0 or the pending action of the player is not the action of waiting:
      [irrelevant]
      repeat with the character considered running through people who are not the player:
         [irrelevant]
         if the wait timer of the character considered is 0 and the pending action of the character considered is waiting:
            let the chosen action be the stored action produced by the action selection rules for the character considered;
            if the chosen action is not waiting:
               try the chosen action.

The action selection rules are a person based rulebook producing a stored action.
A action selection rule (this is the default action selection rule):
   rule succeeds with result the action of waiting.

Action selection someone (called John Doe) (this is the default action selection rule):
   rule succeeds with result the action of John Doe waiting.

Rule for setting action variables for going (this is the timed set going variables rule):
   now the speed gone at is the number produced by the going speed selection rules for the actor;
   [continued]

There is room.

The going action has a number called the speed gone at.

Rule for setting action variables for an actor going (this is the timed set going variables rule):
   now the speed gone at is the number produced by the going speed selection rules for the actor;
   showme  the speed gone at;
   [continued]
   
The going speed selection rules are a people based rulebook producing numbers.

A going speed selection rule:
   rule succeeds with result 1.