set 3 seconds for slider to open

resources/js/app.js

@@ -124,7 +124,7 @@ document.addEventListener('DOMContentLoaded', function() {
             } else {
                 var start = window.pageYOffset;
                 var target = start + scrollAmount;
-                var duration = 1500; // duration of the animation
+                var duration = 3000; // duration of the animation
                 var startTime = null;
 
                 function scrollStep(timestamp) {