diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..c41b5675e 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,54 @@
-function setAlarm() {}
+function time_convert(num) {
+ let minutes = Math.floor((num % 3600) / 60);
+ let seconds = num % 60;
+ return minutes.toString().padStart(2, '0') + ":" + seconds.toString().padStart(2, '0');
+}
+let currentInterval = null;
+
+function setup() {
+ document.getElementById("set").addEventListener("click", setAlarm);
+ document.getElementById("stop").addEventListener("click", pauseAlarm);
+}
+
+function setAlarm() {
+ if (currentInterval !== null) return;
+
+ const alarmSetInputEl = document.getElementById("alarmSet");
+ let timeEl = Number(alarmSetInputEl.value);
+ if (!Number.isFinite(timeEl) || timeEl <= 0) {
+ alert("Please enter a valid number greater than 0");
+ return;
+ }
+ const timeRemainingCounterEl = document.getElementById("timeRemaining");
+ const button = document.getElementById("set");
+
+ button.disabled = true;
+
+ currentInterval = setInterval(() => {
+ timeEl--;
+
+ timeRemainingCounterEl.textContent = `Time Remaining: ${time_convert(timeEl)}`;
+
+ if (timeEl <= 0) {
+ clearInterval(currentInterval);
+ currentInterval = null;
+
+ timeRemainingCounterEl.textContent = "Done!";
+ playAlarm();
+ button.disabled = false;
+ }
+ }, 1000);
+}
+
+function pauseAlarm() {
+ if (currentInterval !== null) {
+ clearInterval(currentInterval);
+ currentInterval = null;
+
+ document.getElementById("set").disabled = false;
+ }
+}
+
// DO NOT EDIT BELOW HERE
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..bffbf369c 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -4,7 +4,7 @@
- Title here
+ Alarm clock app
@@ -18,3 +18,4 @@
Time Remaining: 00:00