diff --git a/02/app.js b/02/app.js
index 1c9992e..105c609 100644
--- a/02/app.js
+++ b/02/app.js
@@ -1 +1,16 @@
-console.log('DOM');
\ No newline at end of file
+document.addEventListener('DOMContentLoaded', function () {
+    const links = document.querySelectorAll('a[data-url]');
+
+    links.forEach(link => {
+        const url = link.getAttribute('data-url');
+
+        if (url !== 'null') {
+            link.setAttribute('href', url);
+        } else {
+            link.style.color = 'grey';  
+            link.addEventListener('click', function (event) {
+                event.preventDefault();  
+            });
+        }
+    });
+});