custom COOKIE on custom page

i have problem with create function for set cookie dynamically.

when i try in custom page i have of course header is set and i tried something like this: in custompage.php:

myfunction($cookiename,$cookievalue);

in function.php

add_action("init","myfunction",10,2);
function myfunction($name,$value) {
setcookie($name,$value,time()+3600);
}
add_action("wp_head","mySEOfunction",10,2);
function mySEOfunction($name,$value) {
echo "some meta tags...".$name...
}

i have Missing argument 2 in function.php i tried also this for SEO meta tags created dynamically but i have same problem...

any help?