diff --git a/background.js b/background.js
index 33e54c3b1fe23d0d8d98264c522e6c48696d38fb..d8632fb7caab24fd4887805723bf4aeedfa25f92 100644
--- a/background.js
+++ b/background.js
@@ -1,7 +1,6 @@
-// background.js
-
 let css = "";
 
+//Initialize the CSS storage on startup
 chrome.runtime.onInstalled.addListener(() => {
 	chrome.storage.sync.set({css});
 });
diff --git a/main.js b/main.js
index fc4be40e706e4fa7dca70fb10cd484199d0a0cbf..ed3d130e61594c058bb37b79feb8ff03cac77bcd 100644
--- a/main.js
+++ b/main.js
@@ -5,6 +5,8 @@ editor.setTheme("ace/theme/monokai");
 editor.session.setMode("ace/mode/css");
 
 
+//When the CSS editor changes, store it in the shared storage 
+//and call the background parseCSS script
 editor.getSession().on('change',  function() {
 	chrome.tabs.query({ active: true, currentWindow: true }, 
 		function(tabs) {
@@ -20,25 +22,32 @@ editor.getSession().on('change',  function() {
 
 function parseCSS() {
 	console.log("Parsing CSS");
-	//get access to the main document
+	//Get access to the css written in the popup
 	chrome.storage.sync.get("css", function(cssObj) {
+
+		//Split the rules 
 		let rules = cssObj.css.split("}");
 		for(let r of rules) {
-			let sel = r.split("{")[0];
-			if(sel.search(/ */i)<0) {
+			console.log(r);
+			//Test if not empty
+			if(r.search(/[\w]+/i)>=0) {
+
+				//Retrieve the selector
+				let sel = r.split("{")[0];
 				console.log("Selector ", sel);
+
+				//Retrieve the corresponding elements
 				let els = document.querySelectorAll(sel);
 				for(let e of els) {
-					console.log(e.innerHTML);
+
+					//Apply the properties to each
+
+					//TEMP, just put the background color in blue
 					e.style["background-color"] = "blue";
 				}
 			}
 		}
 	});
-
-
-
-
 }
 
 
diff --git a/popup.html b/popup.html
index ff7f5868aa7acbb815f8dc785fd0f260fcd65813..07eea99e030f0c0dba428b6192dd44898c38ae31 100644
--- a/popup.html
+++ b/popup.html
@@ -5,7 +5,7 @@
 	</head>
 	<body>
 		<h1>CssLsd</h1>
-		<div id="editor">
+		<div id="editor"> 
 body {
 	background-color:blue;
 }