diff --git a/css/flex.css b/css/flex.css
new file mode 100644
index 0000000..5ae9261
--- /dev/null
+++ b/css/flex.css
@@ -0,0 +1,17 @@
+.bigbox{
+    width: 100%;
+    border: 2px solid yellowgreen;
+    padding: 1em 1em 0 1em;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+.box{
+    width: 150px;
+    height: 150px;
+    margin: 0 1em 1em ;
+    background-color: yellowgreen;
+}
+.grow{
+  flex-grow: 1;
+}
\ No newline at end of file
diff --git a/css/form.css b/css/form.css
new file mode 100644
index 0000000..c4834e7
--- /dev/null
+++ b/css/form.css
@@ -0,0 +1,18 @@
+.contact{
+  margin: 2rem auto;
+}
+fieldset{
+  padding: 0;
+  border: none;
+}
+legend{
+  font-weight: 900;
+  margin: 2rem 0;
+}
+label{
+  display: inline-block;
+  width: 50%;
+}
+label{
+margin: .6rem 0;
+}
\ No newline at end of file
diff --git a/html/flex.html b/html/flex.html
new file mode 100644
index 0000000..ef8b149
--- /dev/null
+++ b/html/flex.html
@@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<html lang="de">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="description" content="Die HTML Struktur in Webseiten">
+    <title>HTML Struktur</title>
+    <link rel="stylesheet" href="../css/reset.css">
+    <link rel="stylesheet" href="../css/code.css">
+    <link rel="stylesheet" href="../css/style.css">
+    <link rel="stylesheet" href="../css/flex.css">
+</head>
+
+<body>
+    <header>
+        <div class="wrapper">
+            <a href="../index.html"><img src="../img/logo.svg" alt="Mein logo" title="Der Titel meines Bildes"></a>
+            <nav role="navigation">
+                <ul>
+                    <li><a href="float.html">Float</a></li>
+                    <li><a href="position.html">Position</a></li>
+                    <li><a href="flexbox.html">Flexbox</a></li>
+                    <li><a href="grid.html">Grid</a></li>
+                </ul>
+            </nav>
+        </div>
+    </header>
+
+    <main role="main" class="wrapper">
+        <h1>Inhalt strukturieren mit Flexbox</h1>
+        <article>
+            <h2>Flex row</h2>
+              <div class="bigbox">
+                <div class="box"></div>
+                <div class="box grow"></div>
+                <div class="box"></div>
+                <div class="box"></div>
+            </div>
+        </article>
+        <article class="">
+            <h2>Die Boxen</h2>
+            <pre class="line-numbers language-html">
+<code class="language-html">&lt;div class=&quot;bigbox&quot;&gt;
+  &lt;div class=&quot;box&quot;&gt;&lt;/div&gt;
+  &lt;div class=&quot;box grow&quot;&gt;&lt;/div&gt;
+  &lt;div class=&quot;box&quot;&gt;&lt;/div&gt;
+  &lt;div class=&quot;box&quot;&gt;&lt;/div&gt;
+&lt;/div&gt;
+</code>
+</pre>
+            <h2>& Die zentrierte Flexbox</h2>
+            <pre class="line-numbers language-html">
+<code class="language-css">.bigbox{
+  width: 100%;
+  border: 2px solid yellowgreen;
+  padding: 1em 1em 0 1em;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+.box{
+  width: 150px;
+  height: 150px;
+  margin: 0 1em 1em ;
+  background-color: yellowgreen;
+}
+.grow{
+flex-grow: 1;
+}
+</code>
+</pre>
+
+
+    </main>
+
+    <footer>
+        <div class="wrapper">
+            <p><a title="Link zu Download" href="https://git.perin.work/andy/webdev">Download</a></p>
+        </div>
+    </footer>
+    <script src="../js/code.js"></script>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/index.html b/index.html
index 89be7f1..ed8549f 100644
--- a/index.html
+++ b/index.html
@@ -100,10 +100,10 @@
     <h3 class="mume-header" id="interne-links-1">Interne Links</h3>
 
     <ul>
-      <li><a href="file:///home/andy/cloud/schule/webdev/html/float.html">float</a></li>
-      <li><a href="file:///home/andy/cloud/schule/webdev/html/position">position</a></li>
-      <li><a href="file:///home/andy/cloud/schule/webdev/html/flex.html">flexbox</a></li>
-      <li><a href="file:///home/andy/cloud/schule/webdev/html/grid.html">grid</a></li>
+      <li><a href="html/float.html">float</a></li>
+      <li><a href="html/position.html">position</a></li>
+      <li><a href="html/flex.html">flexbox</a></li>
+      <li><a href="html/grid.html">grid</a></li>
     </ul>
 
   </main>
