Story: Light setter

[Yoric]

Meta-bug: #2

When the motion detector hasn't seen any movement in 10 minutes,
turn off the lignts.

Can be expressed as

I need:
- `motion detectors` (at least one) with property `is there motion`;
- `lights` (at least one) to `turn off`;
- `10 minutes countdown` to `start`, `stop`, with property `is done`.

1. When `is there motion` of `motion detector` switches to false
do `start` with `10 minutes countdown`;
2. When `is there motion` of `motion detector` switches to true
do `stop` with `10 minutes countdown`;
3. When `is done` of `10 minutes countdown` switches to true
do `turn off` with `lights`.

Note that this does not require any explicit state.

Input devices

• motion detector, with property is there motion;
• 10 minutes countdown, built-in, with property is done.

Output devices

• lights, with capability turn off;
• 10 minutes countdown (the same one), with capabilities start, stop

Note that applications are sandboxed, so the 10 minutes countdown is
not visible by other applications.

Values

Nothing new here.