Redirect after x seconds

Hi
i have 3 pages (FirstPage.aspx,SecondPage.aspx,ThirdPage.aspx)
in the FirstPage.aspx a form filled by customer and redirect to the SecondPage.aspx
in the SecondPage.aspx there is a thank you message and a cookie is created for that customer.
after 5 seconds customer will be redirected to the ThirdPage.aspx
 
i think i am going to use the Timer class but i dont know how.
could anyone give me an example for my problem how am i going to use it ?
 
thanks
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