added new exercice

exo_011/index.html

@@ -0,0 +1,15 @@
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>title</title>
+    <link href="https://cdn.jsdelivr.net/npm/bulma@0.9.4/css/bulma.min.css" rel="stylesheet">
+</head>
+<body>
+
+<div id="livre"></div>
+
+<script src="script.js"></script>
+</body>
+</html>