diff --git a/concept/index.html b/concept/index.html
index d01f779..7b16593 100644
--- a/concept/index.html
+++ b/concept/index.html
@@ -4,8 +4,17 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Document</title>
+    <link rel="stylesheet" href="style.css">
 </head>
 <body>
+    <header>
+        <li>
+            <ul><a href=""><button>hallo</button></a></ul>
+            <ul><a href=""><button>alvin</button></a></ul>
+            <ul><a href=""></a><button>kkk</button></ul>
+        </li>
+
+    </header>
     
 </body>
 </html>
\ No newline at end of file
diff --git a/concept/style.css b/concept/style.css
index e69de29..f925627 100644
--- a/concept/style.css
+++ b/concept/style.css
@@ -0,0 +1,7 @@
+body{
+    background-color: blueviolet;
+}
+
+header{
+    
+}
\ No newline at end of file
