cron - Can i set cronjob for controller action in magento? -

i created module , has config.xml , controller. in need setup cron job action in controller named testaction().anyone pls me fix issue.

set observer method redirect observer method

$response1 = $observer->getresponse();   $url = 'http://www.website.com/'; $response1->setredirect($url); 

or can check

$observer->getrequest()->setparam('return_url','http://www.google.com/');