Hey there, I am writing a simple game and the only missing part is IO (Sadly, i need that to play). I've got most things pure, e.g. makeMove :: GameState -> Move -> GameState, initialBoard:: GameState and lost :: GameState -> Bool work pure and as intended. I also got a function gameLoop :: GameState -> IO GameState which asks for Input and applies it. I don`t know how to do my main :: IO () which should welcome the player, start the gameloop, and print godbyes the game if it's either won or lost Here i am missing a control structure, to demonstrate: show hello board = initialBoard while (not end board) board = gameLoop board show winner I could also make my Gameloop recursive, while i think that i get this working, it seems awfully complex (and ugly) to me. Best regards Leonhard