[Haskell-beginners] Noob question.(I'm trying 'http://learnyouahaskell.com' tutorial)

ENV Ubuntu 12.04 haskell-platform/precise uptodate 2012.1.0.0~debian ghci --version The Glorious Glasgow Haskell Compilation System, version 7.4.1 I've tried all day with, 'Learn You a Haskell for Great Good!' http://learnyouahaskell.com/ Very attractive book. I'm really enjoying this book. Anyway I have one question, Why I can't declare func type like books? I got always error about 'lacks an accompanying binding', like this, Prelude> :l baby.hs [1 of 1] Compiling Main ( baby.hs, interpreted ) baby.hs:32:1: The type signature for take' lacks an accompanying binding Failed, modules loaded: none. Here is codepad link, http://codepad.org/ttZRBpkL Thanks.