The example below will display "Hello World!" for 3 seconds,
and then take you to the file "test.wml":
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml"><wml>
<card ontimer="test.wml">
<timer value="30"/>
<p>Hello World!</p>
</card>
</wml>