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PDP-8 Kaleidoscope

iPhone / iPad
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Creates complex moving patterns of lines and curves in response to touching the screen.

Kaleidoscope is based on an anonymously written program of the same name for the DEC PDP-8 computer. It was somewhat remarkable because the original program was only about 40 bytes long yet generated complex moving patterns consisting of various conic sections (circles, ellipses, parabolas and hyperbolas).