The Last Image You Carry In

Nearly every argument about screens at night is an argument about light. Lux, colour temperature, the little amber toggle three menus deep in the settings. We are going to leave that argument completely alone. Partly because it has had plenty of attention, and mostly because it is not ours to settle — we animate rooms, and we are not going to tell anybody what their eyes are doing.

What almost nobody talks about is the other half of the screen: not how bright it was, but what was on it.

Why this isn't the blue light piece

The light argument is attractive because it is measurable. You can put a number on a screen. You cannot easily put a number on an argument in a comments section, so it drops out of the conversation, even though it is the part almost everyone would recognise if you described it.

Here is the description. It is eleven at night. You are not doing anything in particular; you are scrolling, which is the modern word for standing in a doorway. In four minutes you have passed a stranger being publicly humiliated, an aeroplane on fire, someone's kitchen renovation, a joke, and a chart. Then you put the phone face down, and the room is dark, and something is still going.

That something is not photons. The screen has been off for a minute and a half. It is the residue of the last few things, and the reason it lingers is boring and mechanical: the last input before quiet is the one with nothing after it to displace it.

The screen stops when you turn it off. What was on it doesn't.

That is the whole thesis, and everything below is just consequences of it.

The last ten minutes have contents

We tend to talk about screen time as a quantity — three hours, six hours, a number in a weekly report. Quantity is the wrong unit for the end of the evening. At eleven at night the useful unit is what, and the honest answer for most of us is: no idea, it was chosen for me.

There is a real difference between things that arrive with a shape and things that arrive without one. A chapter has a shape. A single long letter from a friend has a shape. A film has a shape, even a bad one. An infinite feed is deliberately built without one, because a shape is a place where you might stop, and stopping is the thing it is designed to prevent.

None of this is a moral position. We are not going to say that a feed is bad and a book is virtuous; that piece has been written a thousand times, usually by someone being smug. The narrower point is about what happens at the seam. When you close something with a shape, it closes. When you close something without a shape, it stays open, because as far as it is concerned you did not finish — you just stopped, mid-sentence, and the sentence is still hanging there in the dark.

Endings and non-endings

Once you start looking for it, the ending is the whole design.

Things built for the evening tend to have one. Things built for engagement tend not to, and the ones that appear to have one often have an autoplay countdown attached — which is an ending with a hand already on your shoulder.

This is not a small distinction for us; it is the reason our own episodes are the length they are. An episode that finishes is an event. The small silence where the sound used to be is louder than the sound ever was. So we make them long enough to outlast the person watching, and when they end they end into quiet rather than into the next thing. That is a design decision about someone else's night, and we think about it more than is probably reasonable.

Choosing it on purpose

The move here is small and slightly odd, and it is the only actual suggestion in this piece: decide in advance what the last thing you look at will be.

Not stop looking at things. Choose the last one.

1. 1

   Pick the image before you need it

   Sometime when it is easy — a Tuesday afternoon — decide what the last screen of the night is. A window with rain on it. A fire. A photograph of a place. It matters much less what it is than that it was chosen by you rather than by a ranking system.

2. 2

   Make it one thing, for longer than you think

   A minute is not enough to displace what is already there. Four or five is. This is not concentration and it is not a practice; you are just giving the last slot of the evening to something you picked.

3. 3

   Let it be the last one

   The whole thing collapses if there is one more check afterwards. If you know there will be, do the check first and the chosen image second. Order is the entire mechanism.

If you want ours, the moods exist for exactly this slot — one thing, no ending, nothing queued behind it. But a photograph of your grandmother's kitchen on your own camera roll will do the same job, and costs nothing.

In defence of the screen

We should say this clearly, because the genre this piece belongs to is usually dishonest about it.

Sometimes the screen is the right thing. A call with someone three time zones away is often the best part of a night, and it is a screen. Reading in bed is a screen for a lot of people, and the alternative is not reading. Someone lying awake in a very quiet flat may find that a lit rectangle with a voice in it is the kindest object in the room at that hour, and we are not going to stand here in a warm font and tell them to put it down.

"No screens after nine" is a rule that works beautifully for people whose lives already look like the rule. For everyone else it mostly produces a small extra failure to feel bad about at half past ten.

So the suggestion is not less. It is last: whatever the evening contained, let the final few minutes be something you chose.

What this is not

Plainly: there is no health claim here of any kind. Nothing on this page says that changing your last four minutes does anything to your sleep, because we do not know that and it is not our field. We build rooms and animate weather; the correct people to ask about sleep are doctors, and if your nights are consistently hard, that is the conversation to have rather than this one.

What is left when you take the claims out is still worth something, and it is only this: the last thing you look at is one of the very few parts of the evening that is entirely yours to pick. Most of the day gets chosen for you. That bit doesn't.

We wrote elsewhere about the twenty minutes before bed — the shape of the evening's last stretch. This is the smaller version of the same idea: not the twenty minutes, just the final four, and what you decide to put in them.

The evening is warm here.