[Lua][Question]Help with functions

I'm trying to have my program wait an amount of time before it proceeds to the next piece of code, but sleep doesn't seem to be working! Any suggestions?

EDIT: opps typed a true instead of a false somewhere my bad. go help someone else.

Yes I would use os.startTimer() and then os.pullEvent()

Small Example

os.startTimer(5) -- start5 second timer
local, event, p1 == os.pullEvent("timer") -- wait for a timer event
if p1 == "timer" then -- check to make sure the timer went off
insert code to continue
end

You can probably do it without the if statement, but its a good double verification.