I have googled extensively and searched these forums, but still can't find the exact thing I am looking for.

Similar to this:

But without the user input fields or buttons. Just the digits.
And I really only need min:sec, not hours.

For example, on page load, is is possible for the display time to be
:40, and be static for 5 seconds, THEN start counting down.
Then it just stays at 0:00. Is this possible with javascript?