There are a few different ways you can do this,
You can do this with just an html meta tag
<META HTTP-EQUIV=Refresh CONTENT="4; URL=http://yoursite.com/page2.html">
//content=4: means refresh in 4 seconds
//URL this is where you want the browser to refresh
You can also do this in PHP using these functions:
sleep()
header()
flush();
sleep(5);
header("Location: page2.html");
//maybe something like this however this snippet used exactly I
//don't think will work....but at least get you on the right track
There are also ways to do this with javascript:
http://htmlgoodies.com
search for redirect