diff --git a/index.htm b/index.htm
index a8ba3b2..c1b4342 100644
--- a/index.htm
+++ b/index.htm
@@ -8,6 +8,7 @@
+
diff --git a/js/main.js b/js/main.js
index 6286be0..c2cb5ff 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,5 +1,7 @@
/* HTML contents */
+var body = document.body;
var timerHTML = document.getElementById("timer");
+var ding = document.getElementById("ding");
/* GET url variable */
const queryString = window.location.search;
@@ -14,6 +16,8 @@ let localTimer = setInterval(() => {
timer.decrement();
if(timer.getTime() < 0) {
clearInterval(localTimer);
- timerHTML.style.color = "red";
+ body.style.backgroundColor = "red";
+ timerHTML.style.color = "white";
+ ding.play();
}
}, 1000);
\ No newline at end of file
diff --git a/sounds/ding.mp3 b/sounds/ding.mp3
new file mode 100644
index 0000000..b351312
Binary files /dev/null and b/sounds/ding.mp3 differ