added the scroll to top button work

added the code to make the scroll to top button actually scroll to the top *-*

functions.php

@@ -3,7 +3,6 @@
 function learningWordPress_resources() {
 
 	wp_enqueue_style('style', get_stylesheet_uri());
-
 }
 
 add_action('wp_enqueue_scripts', 'learningWordPress_resources');

header.php

@@ -5,6 +5,8 @@
 		<meta name="viewport" content="width=device-width">
 		<title><?php bloginfo('name'); ?></title>
     <script src="https://use.fontawesome.com/e48fabcf5a.js"></script>
+    <script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
+    <script src="http://20578.tk/architect-wordpress/wp-content/themes/architect/js/smoothscroll.js"></script>
 		<?php wp_head(); ?>
 	</head>
 

js/smoothscroll.js

@@ -0,0 +1,13 @@
+jQuery(document).ready(function($){
+	$(window).scroll(function(){
+        if ($(this).scrollTop() < 200) {
+			$('#smoothup') .fadeOut();
+        } else {
+			$('#smoothup') .fadeIn();
+        }
+    });
+	$('#totop').on('click', function(){
+		$('html, body').animate({scrollTop:0}, 'fast');
+		return false;
+		});
+});