Previously: security engineer at Square, co-author of HackLang, put the 's' in https at Facebook. Maker of CTFs.
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I recently came across a piece of assembly code, written by Li-Chen Wang, which displays a Kaleidoscope. This code was written in 1976, and distributed for $15 on a punched tape. It appears this was one of three pieces of code used to demonstrate the capabilities of Cromemco's Dazzler, the first commercial color graphics card for microcomputers.