Jak vytvořit upozornění dole v pravém rohu?

<script>
setTimeout(function(){ go("zprava","ahoj"); }, 3000);
setTimeout(function(){ go("zprava","cau"); }, 6000);

function go(title, text){
var icon = "https://tools.lynt.cz/lynt-kola-128.png";
if("Notification" in window) {
    if(Notification.permission == "granted") {
        var notification = new Notification(title, {"body":text, "icon": icon});
    } else {
        Notification.requestPermission(function (permission) {
            if (permission === "granted") {
                var notification = new Notification(title, {"body":text, "icon": icon});
            }
        });
    }
} else {
    alert("Neni podpora");
}
}
</script>