diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..839606f73 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,46 @@
-function setAlarm() {}
+let timerId = null;
+let remainingSeconds = 0;
+
+function updateDisplay() {
+ const minutes = String(Math.floor(remainingSeconds / 60)).padStart(2, "0");
+ const seconds = String(remainingSeconds % 60).padStart(2, "0");
+ document.getElementById(
+ "timeRemaining"
+ ).textContent = `Time Remaining: ${minutes}:${seconds}`;
+}
+
+function startCountdown() {
+ timerId = setInterval(() => {
+ remainingSeconds--;
+ updateDisplay();
+
+ if (remainingSeconds <= 0) {
+ remainingSeconds = 0;
+ clearInterval(timerId);
+ timerId = null;
+ playAlarm();
+ }
+ }, 1000);
+}
+
+function setAlarm() {
+ const input = document.getElementById("alarmSet");
+ if (input.value === "") return;
+ remainingSeconds = Number(input.value);
+ if (!Number.isFinite(remainingSeconds)) return;
+ clearInterval(timerId);
+ timerId = null;
+
+ if (remainingSeconds <= 0) {
+ remainingSeconds = 0;
+ updateDisplay();
+ playAlarm();
+ } else {
+ updateDisplay();
+ startCountdown();
+ }
+ input.value = "";
+}
// DO NOT EDIT BELOW HERE
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..9ced13b41 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -4,7 +4,7 @@
- Title here
+ Alarm clock app"