Add copyleft notice.

diff --git a/implementations/scheme-chicken/joy.scm b/implementations/scheme-chicken/joy.scm
index caab11a..1c2def0 100644 (file)
--- a/implementations/scheme-chicken/joy.scm
+++ b/implementations/scheme-chicken/joy.scm
@@ -1,3 +1,31 @@
+|*
+
+████████╗██╗  ██╗██╗   ██╗███╗   ██╗
+╚══██╔══╝██║  ██║██║   ██║████╗  ██║
+   ██║   ███████║██║   ██║██╔██╗ ██║
+   ██║   ██╔══██║██║   ██║██║╚██╗██║
+   ██║   ██║  ██║╚██████╔╝██║ ╚████║
+   ╚═╝   ╚═╝  ╚═╝ ╚═════╝ ╚═╝  ╚═══╝
+
+Copyright © 2023 Simon Forman
+
+This file is part of Thun
+
+Thun is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Thun is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Thun.  If not see <http://www.gnu.org/licenses/>.
+
+*|
+
 (import (chicken io))
 (import (chicken string))
 (import srfi-69)