Attempt to call nil

So I have this code: http://pastebin.com/BXicDMb3
It runs fine up until the writeLine part where whenever I input something I get attempt to call nil, I've tried everything and can't seem to get it working, thanks in advance for any help.

io uses : not .

Lupus590, on 10 August 2016 - 05:27 PM said:

io uses : not .

Oh my god I didn't even realise that, thank you very much for your help.