[xmonad] Repeated presses on Mod - [1..9] to toggle between windows in workspace

Hello XMonad, How could one extend the behaviour of Mod - [1..9], so that an initial keypress switches to workspace n, but further keypresses toggle between windows in that workspace? (It is the default behaviour of groups in AutoHotKey, and I must admit it has grown on me: it saves one move reaching for Mod-K). Thanks for any Haskell hints.