Sleep(TimeToSleepInSeconds)

Sleep suspends execution of a programme for the number of seconds indicated. No processor cycles should be used by your application while it's dormant, increasing the level of resources available to other programmes.
It returns the time in seconds as GetTime does.

Return value:
Time after completion, in seconds since Jan 1st, 1970.

Example

print(gettime(), "\n")
print(sleep(4), "\n")

854210692.000000
854210696.000000