To run:
Start up.
Handle any events.
Shut down.

To handle any events:
Deque an event.
If the event is nil, exit.
Handle the event.
Repeat.

To handle an event:
If the event's kind is "key down", handle the event (key down).

To handle an event (key down):
Put the event's key into a key.
Write "" then the key to the console.
If the key is the escape key, relinquish control.