diff --git a/all.css b/all.css
index 5407ad7..c7e157a 100644
--- a/all.css
+++ b/all.css
@@ -1,14 +1,17 @@
-body{
-    color: red;
+body {
+  color: red;
 }
-h1{
-    color: green;
+h1 {
+  color: green;
 }
 
 .hexschool {
-    text-align: center;
-    color: #00cc99;
-    font-size: 24px;
-    font-weight: bold;
+  text-align: center;
+  color: #00cc99;
+  font-size: 24px;
+  font-weight: bold;
 }
 
+.pr20221022 {
+  color: navy;
+}
diff --git a/index.html b/index.html
index 6078e61..a5a520c 100644
--- a/index.html
+++ b/index.html
@@ -1,24 +1,23 @@
 <!DOCTYPE html>
 <html lang="en">
-
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
     <title>HexSchool PR practice</title>
-    <link rel="stylesheet" href="all.css">
-</head>
+    <link rel="stylesheet" href="all.css" />
+  </head>
 
-<body>
-    <h1>yunyun PR practice </h1>
+  <body>
+    <h1>yunyun PR practice</h1>
     <div class="hexschool">
-        <p>Hello HexSchool!</p>
+      <p>Hello HexSchool!</p>
     </div>
     <div>This is new PR.</div>
 
     <h2>謝謝洧杰老師，讓我學會git，真的教得很清楚又容易懂!</h2>
     <h3>謝謝老師助教，提供管道讓我們練習 PR</h3>
     <p>PR 練習</p>
-</body>
-
-</html>
\ No newline at end of file
+    <p class="pr20221022">感謝洧杰老師 & 助教！</p>
+  </body>
+</html>
