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From the website:

Random Screen is a mechanical thermodynamic screen that the user can’t control and that functions without any electricity. Conventional tea candles illuminate and generate the changes on the 4×4 pixel screen.
This work is one of a series of low-tech screen projects that was originally inspired by the Blinkenlights media façade of the Chaos Computer Club in Berlin. The predecessor of Random Screen is the Papierpixel project in which a manual screen was controlled by a punched tape system that had to be pre-programmed by hand. Random Screen takes the reduction of the electronics one step further. The pixels become independent and fire goes digital.

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