Hint for first part

assets/game1.js

@@ -1,6 +1,9 @@
 /* Game1 entry point built with Webpack Encore */
 import './styles/game1.css';
 
+let sequenceFinished = false;
+let stillPlayingSound = true;
+
 function subscribeToMercure(mercurePublicUrl, topic) {
   try {
     const url = mercurePublicUrl + '?topic=' + encodeURIComponent(topic);
@@ -10,6 +13,25 @@ function subscribeToMercure(mercurePublicUrl, topic) {
       try {
         const data = JSON.parse(event.data);
         console.log('[Mercure][game1] Update:', data);
+
+        // data is [sendTo, message]
+        if (Array.isArray(data) && data.length >= 2) {
+          const messageContainer = document.getElementById('message-container');
+          if (messageContainer) {
+            const msgEl = document.createElement('div');
+            msgEl.className = 'message';
+            msgEl.textContent = data[1];
+            msgEl.style.color = '#0F0'; // Green for incoming messages
+            msgEl.style.marginBottom = '10px';
+            messageContainer.appendChild(msgEl);
+            if(stillPlayingSound)
+            playSound();
+            console.log('[Mercure][game1] sequenceFinished status:', sequenceFinished);
+            if (sequenceFinished) {
+              flashRed();
+            }
+          }
+        }
       } catch (e) {
         console.log('[Mercure][game1] Raw event:', event.data);
       }
@@ -25,6 +47,28 @@ function subscribeToMercure(mercurePublicUrl, topic) {
   }
 }
 
+function playSound() {
+  const sound = document.getElementById('message-sound');
+  if (sound) {
+    sound.currentTime = 0;
+    sound.play().catch(e => console.warn('[Audio] Playback failed:', e));
+  }
+}
+
+function flashRed() {
+  console.log('[Game1] Triggering flashRed');
+  const body = document.body;
+  body.classList.remove('flash-red');
+  void body.offsetWidth; // Trigger reflow to restart animation
+  body.classList.add('flash-red');
+
+  // Also remove it after animation finishes so it's clean for inspection
+  setTimeout(() => {
+    body.classList.remove('flash-red');
+    console.log('[Game1] Removed flash-red class');
+  }, 150);
+}
+
 async function fetchJson(url, options = {}) {
   const opts = { ...options };
   const headers = new Headers(opts.headers || {});
@@ -125,16 +169,26 @@ document.addEventListener('DOMContentLoaded', async () => {
 
     const printNextMessage = () => {
       if (currentMessageIndex < messages.length) {
+
         const msg = messages[currentMessageIndex];
         const msgEl = document.createElement('div');
-        msgEl.className = 'message';
+
+        let extraClass = '';
+        if(msg[2])
+          extraClass = msg[2];
+
+        msgEl.className = 'message ' + extraClass;
         msgEl.textContent = msg[0];
-        msgEl.style.color = '#F00';
         msgEl.style.marginBottom = '10px';
         messageContainer.appendChild(msgEl);
 
+        playSound();
+
         currentMessageIndex++;
         setTimeout(printNextMessage, msg[1]);
+        if (sequenceFinished) {
+          flashRed();
+        }
       } else {
         // After it has printed a set of messages, it has to start a timer of 2 seconds
         console.log('[Game1] All messages printed. Starting 2s timer to expand message-container height...');
@@ -146,6 +200,8 @@ document.addEventListener('DOMContentLoaded', async () => {
           // Add event listener for Enter key
           inputField.addEventListener('keypress', async (e) => {
             if (e.key === 'Enter') {
+              stillPlayingSound = false;
+              sequenceFinished = false;
               const message = inputField.value.trim();
               if (message && apiEchoUrl) {
                 inputField.value = '';
@@ -163,6 +219,8 @@ document.addEventListener('DOMContentLoaded', async () => {
           });
 
           console.log('[Game1] message-container height changed to 400vh and input enabled');
+          sequenceFinished = true;
+          console.log('[Game1] sequenceFinished is now TRUE');
         }, 2000);
       }
     };