diff --git a/css-ass/style.css b/css-ass/style.css
index e69de29..8416e48 100644
--- a/css-ass/style.css
+++ b/css-ass/style.css
@@ -0,0 +1,18 @@
+h1{
+    text-align:center;
+}
+#content-box{
+    background-color:greenyellow;
+}
+#content-box div.horizontal-lists{
+    color: blue;
+}
+.chapter-name{
+    font-weight: bold;
+}
+#current-chapter >div.chapter-name:first-child{
+    color: red;
+}
+#box-layout{
+    padding: 0px 10%;
+}
\ No newline at end of file
diff --git a/js-ass/script.js b/js-ass/script.js
index 0233287..9791f24 100644
--- a/js-ass/script.js
+++ b/js-ass/script.js
@@ -63,11 +63,24 @@ const checkGuess = () => {
     guesses.textContent = 'Previous guesses: ';
   }
 
-
   guesses.textContent += userGuess + ' ';
   // TODO 
   // 입력값에 따라 , isLow, isHigh, Collect 등의 함수를 호출 
   // guess Count가 10이 될 경우 game over
+  if (guessCount === 10) {
+    gameOver();
+  }
+  else{
+    if (userGuess > randomNumber) {
+    isHigh();
+    }
+    else if (userGuess < randomNumber) {
+    isLow();
+    }
+    else {
+    collect();
+    }
+  }
   guessCount++;
   guessField.value = '';
   guessField.focus();