diff --git a/week-3/alarmclock/alarmclock.js b/week-3/alarmclock/alarmclock.js
index 6ca81cd3..da17580e 100644
--- a/week-3/alarmclock/alarmclock.js
+++ b/week-3/alarmclock/alarmclock.js
@@ -1,4 +1,27 @@
-function setAlarm() {}
+let alarmTime;
+let remainingTime = document.querySelector("#timeRemaining");
+let intervalID;
+
+function setAlarm() {
+  clearInterval(intervalID);
+  let alarmInput = document.getElementById("alarmSet");
+  alarmTime = alarmInput.value;
+  intervalID = setInterval(updateTimeRemaining, 1000);
+  updateTimeRemaining();
+}
+
+function updateTimeRemaining() {
+  let minutes = Math.floor(alarmTime / 60);
+  let seconds = alarmTime % 60;
+  remainingTime.innerText = `Time Remaining: ${minutes
+    .toString()
+    .padStart(2, "0")}:${seconds.toString().padStart(2, "0")}`;
+  if (alarmTime === 0) {
+    playAlarm();
+    clearInterval(intervalID);
+  }
+  alarmTime--;
+}
 
 // DO NOT EDIT BELOW HERE
 
diff --git a/week-3/alarmclock/index.html b/week-3/alarmclock/index.html
index 48e2e80d..c375ab24 100644
--- a/week-3/alarmclock/index.html
+++ b/week-3/alarmclock/index.html
@@ -1,20 +1,23 @@
 <!DOCTYPE html>
 <html lang="en">
-  <head>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <link rel="stylesheet" href="style.css" />
-    <title>Title here</title>
-  </head>
-  <body>
-    <div class="centre">
-      <h1 id="timeRemaining">Time Remaining: 00:00</h1>
-      <label for="alarmSet">Set time to:</label>
-      <input id="alarmSet" type="number" />
 
-      <button id="set" type="button">Set Alarm</button>
-      <button id="stop" type="button">Stop Alarm</button>
-    </div>
-    <script src="alarmclock.js"></script>
-  </body>
-</html>
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="style.css" />
+  <script defer src="alarmclock.js"></script>
+  <title>Alarm Clock</title>
+</head>
+
+<body>
+  <div class="centre">
+    <h1 id="timeRemaining">Time Remaining: 00:00</h1>
+    <label for="alarmSet">Set time to:</label>
+    <input id="alarmSet" type="number" />
+
+    <button id="set" type="button">Set Alarm</button>
+    <button id="stop" type="button">Stop Alarm</button>
+  </div>
+</body>
+
+</html>
\ No newline at end of file
