#wait Command

I'm having some trouble using the #wait command. Rather, it doesn't seem to be working.
I tried:
#wait {5};#showme 5 seconds elapsed.
and (had to try)
#wait {5000};#showme 5000 miliseconds elapsed.
But neither worked- the messages showed up immediately.
What is wrong?
I tried:
#wait {5};#showme 5 seconds elapsed.
and (had to try)
#wait {5000};#showme 5000 miliseconds elapsed.
But neither worked- the messages showed up immediately.
What is wrong?