diff --git a/AABB_tree/demo/AABB_tree/init.js b/AABB_tree/demo/AABB_tree/init.js
new file mode 100644
index 00000000000..e7f08e266c6
--- /dev/null
+++ b/AABB_tree/demo/AABB_tree/init.js
@@ -0,0 +1,2 @@
+main_window.hello();
+main_window.hello();