:smoking clover: [ITS] n. A {display hack} originally due to
Bill Gosper. Many convergent lines are drawn on a color monitor in
{AOS} mode (so that every pixel struck has its color
incremented). The lines all have one endpoint in the middle of the
screen; the other endpoints are spaced one pixel apart around the
perimeter of a large square. The color map is then repeatedly
rotated. This results in a striking, rainbow-hued, shimmering
four-leaf clover. Gosper joked about keeping it hidden from the
FDA (the U.S.'s Food and Drug Administration) lest its
hallucinogenic properties cause it to be banned.
-- The AI Hackers Dictionary
