Is there a wait() command?

Is there a piece of code or something like that used to make the script wait a couple seconds, then proceed? I've tried a bunch of different ways to do it with the wait() command but now I'm almost positive that that command doesn't exist.

sleep().

sleep(<nb_of_second_you_want_to_sleep>)
With no argument, it waits 0s (only yields, for use in infinite loop, or parallel)

edit : with no argument, it errors (see my neighbour of below)

aaa, on 07 January 2014 - 02:46 PM said:

sleep(<nb_of_second_you_want_to_sleep>)
With no argument, it waits 0s (only yields, for use in infinite loop, or parallel)

if you code sleep() without a number it errors.