A flash from the past.
Original script written by baldor and me in 1998 and later improved by mixter security.
What a trip down memory lane.
smoothcolor.c is a Linux console color-cycling program that creates smooth color transitions by directly manipulating the VGA palette registers. It continuously cycles through different color combinations (red→yellow→green→cyan→blue→magenta→white) creating a psychedelic effect on the console text. The program runs as a background daemon and requires root access to directly control the VGA hardware ports. You can control the speed of color transitions by passing a microsecond delay value as a command-line argument.