diff --git a/create.php b/create.php
index eb09d2a..28f8b00 100644
--- a/create.php
+++ b/create.php
@@ -29,8 +29,7 @@ if (empty($_POST)) {
 </div>
 <?php
 } else {
-	$length = 6;
-	$token = bin2hex(random_bytes($length));
+	$token = bin2hex(random_bytes(DataBase::CLOUD_CODE_LENGTH));
 	if (isset($_POST['fsize']) && is_numeric($_POST['fsize'])) {
 		$size = $_POST['fsize'];
 	} else {
@@ -50,6 +49,7 @@ if (empty($_POST)) {
 	while (!$db->createCloud($token, $text, $size, $duration) && $cpt < 10) {
 		$token = bin2hex(random_bytes($length));
 		$cpt++;
+		// TODO what to do if no cloud created?
 	}
 	$viewUrl  = 'result.php?id=' . $token;
 	$viewName = 'https://' . $_SERVER['HTTP_HOST'] . '/' . $viewUrl;
diff --git a/db.php b/db.php
index 52ea468..12f72f7 100644
--- a/db.php
+++ b/db.php
@@ -12,6 +12,7 @@ class DataBase
 		'month' => '+1 month'
 	);
 	const DEFAULT_SIZE = 3;
+	const CLOUD_CODE_LENGTH = 6;
 
 	private $db;
 	private $cloud;