Add konami code listener

index.html

@@ -548,6 +548,7 @@
         crossorigin="anonymous"></script>
     <script src="scripts/accessibility.js"></script>
     <script src="scripts/carousel.js"></script>
+    <script src="scripts/konami.js"></script>
 </body>
 
 </html>

scripts/konami.js

@@ -0,0 +1,29 @@
+const konamiCode = [
+    'ArrowUp',
+    'ArrowUp',
+    'ArrowDown',
+    'ArrowDown',
+    'ArrowLeft',
+    'ArrowRight',
+    'ArrowLeft',
+    'ArrowRight',
+    'b',
+    'a'
+];
+
+let konamiCodePosition = 0;
+
+window.addEventListener('keyup', function(e) {
+    const key = e.key;
+    const requiredKey = konamiCode[konamiCodePosition];
+
+    if (key === requiredKey) {
+        konamiCodePosition++;
+        if (konamiCodePosition === konamiCode.length) {
+            console.log('Konami Code Activated!');
+            konamiCodePosition = 0;
+        }
+    } else {
+        konamiCodePosition = 0;
+    }
+});