Lit for a period, not for a person

A round mechanical time switch, face on. Its dial carries four figures and nothing else — 6, 12, 18, 24 — with the 24 at the top, and they run round the opposite way from a clock.

Small gold pegs are pushed in across one continuous arc, between the 24 and the 18. They are the brightest thing in the drawing.

To the right, a printed card: LIGHTS ON 16:30 on one line, LIGHTS OFF 23:00 on the next. Below both, a pale expanse of lit water receding away, three lane lines, nobody in it.

Somebody set those pegs once. Everything underneath them has happened by itself ever since.

Why are the pegs the brightest part of the drawing?

Because they are the whole decision, and it was taken a long time ago.

Pushing a peg into a slot on a rotating dial is how this kind of switch is programmed: each peg closes the circuit for the slice of the day it occupies, and a continuous arc of them is a continuous period of light. It takes a minute to set and it stays set. Nobody returns to the dial.

Everything else in the picture is downstream of that minute. The water is lit because of pegs pushed in by somebody who has probably left the job, and the drawing puts the brightest ink on the small mechanical fact rather than on the room it controls.

Why does the dial carry just four figures?

Because it is displaying a machine's day rather than telling you the time.

A clock face is divided for reading a moment: twelve figures, a hand you glance at. This dial is divided for occupying a span — 6, 12, 18 and 24, with midnight at the top and the numbers running anticlockwise, which is a layout nobody would choose for looking up the time. It exists so a period can be laid onto it with fingers.

The printed card beside it does the human half of the job, translating the arc into two times a person can read. That pairing — a mechanism and a card explaining it — is the same arrangement as three numbered lines still screwed to a wall beside the space where the machine stood.

What does the empty water add?

It shows what the setting produces, which is a lit pool with nobody in it.

The three lane lines are the tell. Lanes are a division of water for people to swim in, and they are drawn here with all three empty, so the room is not merely unoccupied — it is prepared, marked out, and running. Light, lane, schedule, no swimmer.

That is the ordinary state of a building on a timer for most of the hours it is switched on. Nothing has gone wrong and nobody has left in a hurry. The arc simply covers more of the day than anybody uses, in the same way a ceiling grid becomes worth counting during the stretches when there is nothing else going on in the room.

Why does the pool recede instead of lying flat?

Because it puts you standing at one end of it rather than looking at a diagram.

The water is drawn in slight perspective, narrowing as it goes back, like a tank seen from the shallow end. The lane lines converge with it. That single choice sets a viewpoint — somebody at the end of the pool, at the height of a person, looking down the length of it — and a viewpoint implies a body.

Which sharpens the rest. The dial and the card above are drawn flat and face on, the way a machine is drawn, and the water is drawn the way it is seen. One picture holds a mechanism and a view, and the view is empty.

Is a time switch or a pool anybody's to license?

No. The switch, the card and both times were invented for this print.

A dial with pegs is a mechanism, not a work — mechanisms are made by many manufacturers and no drawing of one is a copy of anyone's picture. LIGHTS ON 16:30 and LIGHTS OFF 23:00 name no place, no company and no pool, and nothing here is traced from a photograph.

Where an actual pool is the point — the one you swam in, its real board and its real hours — that is somebody's photograph and somebody's premises, and permission for it is obtainable and part of the job. Where it is not the point, the invented version does more, because two times that identify nothing let the wearer supply the building. Style has no owner. A work does.

Does it work for something other than a pool?

Yes, wherever a period was set once and now runs on its own.

A car park lit until half past eleven, a fountain that plays on a schedule, a heater that comes on in an empty hall, a shop window bright at four in the morning. What has to hold is the pairing: a small mechanical decision drawn precisely, and the large consequence drawn empty.

The same imagined building furnishes a set — a dial on one shirt, a painted otter telling people which side of the corridor to walk on on another. As a gift it lands hardest for somebody who worked in a place like this, because they are the people who know which parts of a building run without anybody asking them to.

Does it print well?

Yes, and the palette is short: two inks on a dark ground.

Bone for the dial ring, the figures and the lettering; warm gold for the pegs and the two times. On deep navy, that gives the pegs the loudest position in the design without a gradient anywhere, which matters because a soft glow spread across dark fabric goes grey and muddy. Flat colour with hard edges holds.

The dial is the piece to watch. Small pegs at close spacing will bridge into a solid arc if they are drawn at the weave's floor, so they want to be fewer, wider and further apart than a real dial's — an arc you can still count. The mottled texture in the water works because it is coarse. Navy, charcoal and dark teal all suit it; the design needs a ground dark enough for lit water to read as lit.

How do I get one made?

Describe the setting at JustOG — the mechanism that holds it, the hours printed beside it, and the room it leaves lit. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.

Designs other people have published are in the shop.

At 23:00 the pegs run out and the water goes dark on its own.