hi! i was wondering how to use php for automatic redirection to a page on the website

basically, the visitors first fill out a form, and the form gets e-mailed to me and takes the visitors to a page saying "Thank you for filling out the form".

This form e-mail thing is done using php ... and i was wondering how to incorporate a redirection code in the following code so that afer submitting a form, the user goes to the page thats says "thank you ..." and redirects the user back in 3 seconds to the a different page

PHP Code:
<?PHP 
$to 
"BLABLA@gmail.com"
$subject "Submit a FORM";
$headers "From: Form Mailer";
$forward 0;
$location "";

$date date ("l, F jS, Y"); 
$time date ("h:i A"); 



$msg "Below is the result of your feedback form. It was submitted on $date at $time.\n\n"

if (
$_SERVER['REQUEST_METHOD'] == "POST") {
    foreach (
$_POST as $key => $value) { 
        
$msg .= ucfirst ($key) ." : "$value "\n"
    }
}
else {
    foreach (
$_GET as $key => $value) { 
        
$msg .= ucfirst ($key) ." : "$value "\n"
    }
}

mail($to$subject$msg$headers); 
if (
$forward == 1) { 
    
header ("Location:$location"); 

else { 
    echo 
"Thank you for submitting your review."


?>

THANX A LOT FOR HELPING!!