I don't recommend doing this and tying up an initiator for no real reason, but there is the Unix System Services "sleep" command that will work for this. Or, you can code up your own program, unless your shop already has something available.
I have got a job with two setps. The STEP10 brings the system DOWN and then UP, and SEEP20 runs a program but sometimes fails saying system is still down. THus i want to introduce a Wait between both the steps to avoid such failures.