diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
index 6ca81cd3b..ebb09aa0c 100644
--- a/Sprint-3/alarmclock/alarmclock.js
+++ b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,38 @@
-function setAlarm() {}
+function setAlarm() {
+ const input = document.getElementById("alarmSet");
+ const heading = document.getElementById("timeRemaining");
+
+ let remainingSeconds = Number(input.value);
+
+ function formatTime(totalSeconds) {
+ const minutes = Math.floor(totalSeconds / 60);
+ const seconds = totalSeconds % 60;
+
+ const mm = String(minutes).padStart(2, "0");
+ const ss = String(seconds).padStart(2, "0");
+
+ return `${mm}:${ss}`;
+ }
+
+ heading.innerText = `Time Remaining: ${formatTime(remainingSeconds)}`;
+
+ const intervalId = setInterval(() => {
+ remainingSeconds -= 1;
+
+ if (remainingSeconds > 0) {
+ heading.innerText = `Time Remaining: ${formatTime(remainingSeconds)}`;
+ } else {
+ heading.innerText = "Time Remaining: 00:00";
+ clearInterval(intervalId);
+ playAlarm();
+ document.body.classList.add("flash");
+ }
+ }, 1000);
+}
+
+function stopFlashingBackground() {
+ document.body.classList.remove("flash");
+}
// 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
diff --git a/Sprint-3/alarmclock/style.css b/Sprint-3/alarmclock/style.css
index 0c72de38b..f2ccb38e6 100644
--- a/Sprint-3/alarmclock/style.css
+++ b/Sprint-3/alarmclock/style.css
@@ -13,3 +13,13 @@
h1 {
text-align: center;
}
+
+.flash {
+ animation: flash-bg 0.5s infinite alternate;
+}
+
+@keyframes flash-bg {
+ from { background-color: white; }
+ to { background-color: red; }
+}
+