Control terminal text, cursor, and screen with ANSI escape sequences in Gren.
import Ansi
import Stream exposing (Stream)
coolGreeting : Stream -> Task Never {}
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!