diff --git a/css-ass/index.html b/css-ass/index.html
index fc12b5c..76d59db 100644
--- a/css-ass/index.html
+++ b/css-ass/index.html
@@ -19,7 +19,7 @@ <h1>Chapters</h1>
           Introducing HTML / Basic Structure of HTML / Commonly Used HTML Tags </div>
       </div><br>
       <div class="chapter" id="current-chapter">
-        <div class="chapter-name">Ch 3. CSS: Desiging HTML</div>
+        <div class="chapter-name" id="current">Ch 3. CSS: Desiging HTML</div>
         <div class="horizontal-lists">
           Introducing CSS / Basic Structure of CSS / Selectors </ul>
         </div><br>
@@ -31,7 +31,7 @@ <h1>Chapters</h1>
           </div>
         </div>
       </div>
-    </div>
-    </body>
+    </div>    
+  </body>
 
 </html>
\ No newline at end of file
diff --git a/css-ass/style.css b/css-ass/style.css
index e69de29..b3e4b05 100644
--- a/css-ass/style.css
+++ b/css-ass/style.css
@@ -0,0 +1,26 @@
+body {
+    padding-left: 200px;
+    
+    padding-right: 200px;
+}
+
+h1{
+    text-align: center;
+}
+
+#content-box {
+    background-color: greenyellow;
+}
+
+.chapter-name {
+    font-weight: bold;
+}
+
+#current{
+    color: red;
+}
+
+#content-box .horizontal-lists {
+    color: blue;
+}
+
diff --git a/js-ass/script.js b/js-ass/script.js
index 0233287..c957e38 100644
--- a/js-ass/script.js
+++ b/js-ass/script.js
@@ -68,6 +68,21 @@ const checkGuess = () => {
   // TODO 
   // 입력값에 따라 , isLow, isHigh, Collect 등의 함수를 호출 
   // guess Count가 10이 될 경우 game over
+  if (guessCount < 10) {
+    if (userGuess === randomNumber) {
+      collect();
+    }
+    else if (userGuess > randomNumber) {
+      isHigh();
+    } 
+    else {
+      isLow();
+    }
+  }
+  else {
+    gameOver();
+  }
+  
   guessCount++;
   guessField.value = '';
   guessField.focus();