How Computer Code Became a Modern Design Medium—an Oral History Casey Reas “RGB-056-006-080-823-715” (2015) Code is a tool—a string of numbers, glyphs, and letters that when arranged in a particular order can be wielded like a screwdriver. But code is a visual medium, too, like illustration or sculpting, that in the right hands can create something optically evocative. Poetic, even. Since the 1960