diff --git a/02-counter/setup/app.js b/02-counter/setup/app.js
index e69de29b..de7808fc 100644
--- a/02-counter/setup/app.js
+++ b/02-counter/setup/app.js
@@ -0,0 +1,28 @@
+// Modifies by Aachman
+let count = 0;
+const value = document.querySelector("#value");
+const btns = document.querySelectorAll(".btn");
+
+btns.forEach(function (btn) {
+ btn.addEventListener("click", function (e) {
+ const styles = e.currentTarget.classList;
+ if (styles.contains("decrease")) {
+ count--;
+ } else if (styles.contains("increase")) {
+ count++;
+ } else {
+ count = 0;
+ }
+
+ if (count > 0) {
+ value.style.color = "green";
+ }
+ if (count < 0) {
+ value.style.color = "red";
+ }
+ if (count === 0) {
+ value.style.color = "#222";
+ }
+ value.textContent = count;
+ });
+});
diff --git a/02-counter/setup/index.html b/02-counter/setup/index.html
index 879bb3cc..63c03486 100644
--- a/02-counter/setup/index.html
+++ b/02-counter/setup/index.html
@@ -3,7 +3,7 @@
- Counter
+ Counter by Aachman