diff --git a/LICENSE.txt b/LICENSE.txt
index 90d07f8..5f53152 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -16,6 +16,25 @@ https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 
 
 
+License of wall code
+--------------------
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+
+
+
 License of textures
 -------------------