diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..57a883668 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,48 @@
-function setAlarm() {}
+timerInterval = null;
+function setAlarm() {
+ // 1. Get the input from the user
+ const inputField = document.getElementById("alarmSet");
+ let timeRemaining = parseInt(inputField.value);
+
+ // 2. Validate: If no number or 0 is entered, do nothing
+ if (isNaN(timeRemaining) || timeRemaining <= 0) {
+ return;
+ }
+
+ // 3. Clear any existing timer; prevent multiple alarms running at once
+ clearInterval(timerInterval);
+
+ // 4. Update the display immediately
+ updateTimeDisplay(timeRemaining);
+
+ // 5. Start the countdown
+ timerInterval = setInterval(() => {
+ timeRemaining -= 1;
+
+ updateTimeDisplay(timeRemaining);
+
+ // 6. Check if timer hit zero
+ if (timeRemaining <= 0) {
+ clearInterval(timerInterval);
+ playAlarm();
+ document.body.style.backgroundColor = "red";
+ }
+ }, 1000);
+}
+
+// mm:ss formatting
+function updateTimeDisplay(totalSeconds) {
+ const minutes = Math.floor(totalSeconds / 60);
+ const seconds = totalSeconds % 60;
+
+ //00:00 format
+ const formattedMinutes = minutes.toString().padStart(2, "0");
+ const formattedSeconds = seconds.toString().padStart(2, "0");
+
+ const timeString = `${formattedMinutes}:${formattedSeconds}`;
+ document.getElementById("timeRemaining").innerText =
+ `Time Remaining: ${timeString}`;
+}
// DO NOT EDIT BELOW HERE
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..66748001e 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -1,10 +1,10 @@
-
+
- Title here
+ Alarm clock app