Gren ANSI ANSI escape sequences for grennode apps. import Ansi import Stream exposing (Stream) coolGreeting : Stream -> Cmd msg coolGreeting stdout = "Hello!" |> Ansi.wrapItalic |> Ansi.wrapColor Ansi.Green |> Stream.sendLine stdout See Ansi module docs for everything that's available. There are also functions for controlling the screen and cursor. See the gren-tui examples for usage in a full program, including interactivity!