Added loading animation

src/loading.js

@@ -0,0 +1,21 @@
+'use strict';
+// Small script used for the loading screen
+
+import $ from 'jquery';
+
+async function loadingOneCycle(){
+  $("#loading").fadeOut(600, ()=>{
+    $("#loading").fadeIn(600);
+  })
+};
+
+let timeoutID;
+function startLoadingAnimation(){
+  timeoutID = setInterval(loadingOneCycle, 200);
+}
+
+function stopLoadingAnimation(){
+  clearInterval(timeoutID);
+}
+document.startLoadingAnimation = startLoadingAnimation;//So that's accessible from everywhere
+document.stopLoadingAnimation = stopLoadingAnimation;