# The blink cut

> Eras change the way a person changes what they see: by blinking. The old picture leaves as its machine switched off, the lids hide the swap, and the new one arrives as its machine warmed up.

- URL: https://www.kiruk.in/making/blink-cut
- Kind: Pattern
- Made: 21 Oct 2026
- Author: Arun Kumaar Sreenivasan
- Part of: How this was made (https://www.kiruk.in/making)
- Agent file: https://www.kiruk.in/making/blink-cut/agent.md

![Twelve frames of the eye changing from green phosphor to a black and white bitmap](https://www.kiruk.in/making/loader-eye/cut-1970-1981.webp)

**1970 to 1981 in twelve frames.** The tube collapses, the dark holds, the bitmap draws in.

## The problem

Ten pictures of one eye have to change into each other. A crossfade shows two faces at once. A slide turns the eye into a card. Both admit that these are images being swapped.

## The move

The eye blinks, and the cut happens while it is shut.

- Look: for 70 ms the eye glances the way you are travelling
- Close: the lids come down while the old era leaves in its own way
- **Shut: the swap. Light, lens, page, sign and gaze all change at once, unseen**
- Open: the new era arrives in its own way as the lids lift
- Ready: its sign appears last

A fast sweep across several eras keeps the eye shut until the hand slows. Nothing flashes past.

## Where the idea came from

Three rival concepts for the transition were written and three judges chose between them. All three picked the blink independently. It was the only one where the transition was something the subject does, not something done to it.

## Lineage

### Obeys

- [Calm](https://www.kiruk.in/making/calm) (Principle, Oct 2026): At rest only the eye and its one sign move. A loader is watched for seconds, and anything that darts or shimmers in that time reads as an irritant.

### Used by

- [The loader eye](https://www.kiruk.in/making/loader-eye) (Interface, May to Nov 2026): One human eye, drawn live in the browser and lit only by the screen it is looking at. It was built four times in six months, measured against a photograph of my own eye, and it changes era by blinking.
- [1970, phosphor](https://www.kiruk.in/making/1970-phosphor) (Interface, Oct 2026): The first of the ten ways of seeing. A green tube is the only light in the room, the picture is drawn in glowing cells, and a block cursor waits in the pupil. Every other era was built to match what this one got right.