Title: Using programs to allow some features to work on the computer?

Okay so I am trying to make a simple clock, but it didn't work as it keeps saying: "startup:5: attempt to call nil", and I am getting confused now I had a search for what the error means and it says I have to make a program to utilize the certain bits of code's features? as the code is calling something that isn't recognised? have I not installed something correctly or? I am using minecraft 1.5.1 and the technic launcher (tekkit lite).

here is my code:

funtion infiniteLoop()
while true do
mon = peripheral.wrap("left")
mon.setTimeScale(3)
local time = os.time()
time = textutils.formatTime(time,false)
mon.clear()
mon.setCursorPos(1,1)
mon.write(time)
sleep(1)
end
end
infiniteLoop()

help please

EDIT:
I am a complete newbie to this language, as I use HTML,PHP,C++ etc :/

There is no such thing as "mon.setTimeScale", did you mean mon.setTextScale?

you defined "time" twice. I'm also pretty new to lua, but that might be your problem.

dan200, on 28 March 2013 - 05:50 AM said:

There is no such thing as "mon.setTimeScale", did you mean mon.setTextScale?

aahhhh i see thank you and also do you know how to make a lock that works so a door lock as i tried but it never works i shall paste my code in a minute