diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..57eaf6cf0 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,57 @@
-function setAlarm() {}
+let timer;
+
+function updateDisplay(timeRemaining, heading) {
+ let minutes = Math.floor(timeRemaining / 60);
+ let seconds = timeRemaining % 60;
+
+ heading.innerText =
+ "Time Remaining: " +
+ String(minutes).padStart(2, "0") +
+ ":" +
+ String(seconds).padStart(2, "0");
+}
+
+function setAlarm() {
+ let input = document.getElementById("alarmSet");
+ let heading = document.getElementById("timeRemaining");
+
+ let timeRemaining = parseInt(input.value);
+
+ if (isNaN(timeRemaining) || timeRemaining <= 0) {
+ alert("Please enter a positive number of seconds.");
+ return;
+ }
+
+ clearInterval(timer);
+ pauseAlarm();
+
+ audio.currentTime = 0;
+ document.body.style.backgroundColor = "";
+
+ updateDisplay(timeRemaining, heading);
+
+ function countdown() {
+ timeRemaining = timeRemaining - 1;
+
+ updateDisplay(timeRemaining, heading);
+
+ if (timeRemaining <= 0) {
+ clearInterval(timer);
+ document.body.style.backgroundColor = "red";
+ playAlarm();
+ }
+ }
+
+ timer = setInterval(countdown, 1000);
+}
+
+function stopAlarm() {
+ clearInterval(timer);
+ pauseAlarm();
+}
+
+document.getElementById("set").addEventListener("click", setAlarm);
+document.getElementById("stop").addEventListener("click", stopAlarm);
// DO NOT EDIT BELOW HERE
diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
index 48e2e80d9..ff2d3b453 100644
--- a/Sprint-3/alarmclock/index.html
+++ b/Sprint-3/alarmclock/index.html
@@ -4,7 +4,7 @@
- Title here
+ Alarm clock app