The '5' is the delay time in seconds before opening the URL. The URL is the page you wish to open after the delay. If you redirect the page back to itself it will continue to auto-refresh every 5 seconds. To further enhance the effect, a random time can be applied. To get the random time, insert the following code before the META tag.
<% ' Get Random delay time Randomize DELAY_TIME= Int(Rnd * 90) + 1 ' Set a minimum duration If DELAY_TIME < 30 then DELAY_TIME= DELAY_TIME + 30 End if %>
The random time produced from the script will fall between 30 and 90 seconds. Unless the page is redirected to itself, the META tag should be the last line of code on the page.