MY function is not working

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hello,
I’m trying to put this code on my front page of my website, and yet it doesn’t work.
any suggestions?

$w.onReady( function () {

< 
script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js" > < /script> 

    < 
    script > 
    $(document).ready( function  () { 
        $(document).on("scroll",  function  () {

var pixels = $(document).scrollTop()
if (pixels > 200) {
$(“body”).addClass(“scrolled”)
} else {
$(“body”).removeClass(“scrolled”)
}
})
})

    </script>

});