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is the simplest form of wall clock.
Blink measures a space between the sensation of time, and its measurement, indoors.
Instructions for Use
1 Connect your computer to a video projector, with the resolution set at 640x480 pixels.
2 Align the image so that the frame is all black, with the image in the middle. This will take a bit of tinkering.
3 Project the image onto the wall, above eye level.
the room normally, so that the circle appears as a pale feature on the surface of the wall.
There should be enough light in the room for the dark background of the image to disappear completely.
5 Notice the circle, and the rate of blinking, from time to time.