SSI - #IF statement checking against the date

[sateam]

I would to display a different page depending on the current second value on the server.

if ( second < 6 )
display page1
else if ( second < 13
display page2
else
display page3

This was my attempt but it's not working so I was hoping someone would be able to help me out. I first try and set a variable called second to the %s value of the server time, then I attempt to compare the second to the values I am checking against to display a certain page... I'm sure it's doable I'm just having a hard time figuring it out myself...

<!--#set var="second" value=%s-->
<!--#if expr="%s < 20"-->
 <!--#include virtual="page1.html"-->
<!--#elif expr="%s < 40"-->
 <!--#include virtual="page2.html"-->
<!--#else-->
 <!--#include virtual="page3.html"-->
<!--#endif-->   

Thanks for any help!

[sateam]

By searching through the forums I have found some people trying to do the same thing and have made the following changes but still nothing:

<!--#config timefmt="%S" -->
<!--#if expr="$DATE_LOCAL < /20/" --> 
<!--#include virtual="page1.html"-->
<!--#elif expr="%DATE_LOCAL < /40/"-->
<!--#include virtual="page2.html"-->
<!--#else-->
<!--#include virtual="page3.html"-->
<!--#endif-->