diff --git a/contain.o b/contain.o
index ee58ac1..1c53542 100644
Binary files a/contain.o and b/contain.o differ
diff --git a/display.c b/display.c
index 72c8196..a68c42d 100644
--- a/display.c
+++ b/display.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <gtk-4.0/gtk/gtk.h>
 
+#include "hot.h"
 #include "cold.h"
 #include "display.h"
 #include "contain.h"
@@ -251,6 +252,23 @@ GtkBox *get_rules_comparator_new(){
   return comparator;
 }
 
+GtkBox *get_experimental_box_new(){
+  GtkBox *experimental_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
+  gtk_widget_set_size_request (GTK_WIDGET (experimental_box), 0, 400);
+  gtk_box_append (experimental_box, GTK_WIDGET(gtk_separator_new (GTK_ORIENTATION_HORIZONTAL)));
+  gtk_box_append (experimental_box, GTK_WIDGET(gtk_label_new ("\n\n")));
+  create_experimental_tree(experimental_box);
+  gtk_box_append (experimental_box, GTK_WIDGET(gtk_label_new ("\n\n")));
+  return experimental_box;
+}
+
+GtkBox *get_rules_user_tree_new(){
+  GtkBox *tree_sketch_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
+  gtk_box_append (tree_sketch_box, GTK_WIDGET (get_experimental_box_new()));
+  ui_create_tree (GTK_WIDGET (tree_sketch_box));
+  return tree_sketch_box;
+}
+
 GtkWidget *get_rules_tree_hpaned_new(){
   GtkPaned *H_tree_vs_comparison = GTK_PANED (gtk_paned_new (GTK_ORIENTATION_HORIZONTAL));
 
diff --git a/display.d b/display.d
index b8614e1..8677eb2 100644
--- a/display.d
+++ b/display.d
@@ -1 +1,3 @@
-display.o: display.c cold.h display.h contain.h texts.h tree.h
+display.o: display.c hot.h warm.h \
+ /gnu/store/fkmpkdav2zmz1k72989bdgpdrfac7rz1-glib-2.78.0/include/glib-2.0/glib.h \
+ cold.h display.h contain.h texts.h tree.h
diff --git a/display.h b/display.h
index 6c33748..9367a1a 100644
--- a/display.h
+++ b/display.h
@@ -10,6 +10,7 @@
 GtkWidget *get_text_view();
 GtkFrame *get_frame_with_label();
 GtkWidget *get_run_rules_page_new();
+GtkBox *get_rules_user_tree_new();
 
 GtkWidget *get_image_ALL_SPACE();
 GtkWidget *get_image_GLUTAMATE();
diff --git a/display.o b/display.o
index 1be9540..0d06204 100644
Binary files a/display.o and b/display.o differ
diff --git a/hot.c b/hot.c
index 98626b3..c82db18 100644
--- a/hot.c
+++ b/hot.c
@@ -13,16 +13,28 @@
 //  GTK_ORIENTATION_VERTICAL       GTK_ORIENTATION_HORIZONTAL
 
 
+static void on_experimental_tree_bind_factory (GtkSignalListItemFactory *factory,
+                           GObject* object,
+                           gpointer user_data);
+
 static void on_experimental_expander_toggled(GtkExpander *expander, gpointer user_data){
   gtk_expander_set_expanded (expander, gtk_expander_get_expanded (expander));
   printf(">  %s\n", gtk_expander_get_label (user_data));
 }
 
-GtkBox *get_experimental_box_new(){
-  GtkBox *experimental_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
-  gtk_widget_set_size_request (GTK_WIDGET (experimental_box), 0, 400);
-  gtk_box_append (experimental_box, GTK_WIDGET(gtk_separator_new (GTK_ORIENTATION_HORIZONTAL)));
-  gtk_box_append (experimental_box, GTK_WIDGET(gtk_label_new ("\n\n")));
+void on_experimental_tree_setup_factory (GtkSignalListItemFactory *factory,
+                            GObject* object,
+                            gpointer user_data)
+{
+    GtkWidget* expander = gtk_expander_new (NULL);
+    gtk_list_item_set_child (GTK_LIST_ITEM(object), expander);
+    printf("[on_experimental_tree_setup_factory] here is an expander\n");
+}
+
+void create_experimental_tree (GtkBox *experimental_box){
+    GtkSignalListItemFactory *factory = GTK_SIGNAL_LIST_ITEM_FACTORY (gtk_signal_list_item_factory_new ());
+    g_signal_connect (factory, "setup", G_CALLBACK(on_experimental_tree_setup_factory), NULL);
+    g_signal_connect (factory, "bind", G_CALLBACK(on_experimental_tree_bind_factory), NULL);
 
   GtkExpander *hello = GTK_EXPANDER (gtk_expander_new ("hello !"));
   gtk_expander_set_expanded (GTK_EXPANDER (hello), TRUE);
@@ -35,8 +47,51 @@ GtkBox *get_experimental_box_new(){
   gtk_widget_set_margin_start(GTK_WIDGET (it_s_me), 20);
   g_signal_connect (it_s_me, "activate", G_CALLBACK (on_experimental_expander_toggled), it_s_me);
   gtk_box_append (experimental_box, GTK_WIDGET (it_s_me));
-
-  gtk_box_append (experimental_box, GTK_WIDGET(gtk_label_new ("\n\n")));
-  return experimental_box;
 }
 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+static void on_experimental_tree_bind_factory (GtkSignalListItemFactory *factory,
+                           GObject* object,
+                           gpointer user_data)
+{
+//    GObject *item;
+    const gchar *text;
+    GtkTreeListRow *row;
+    GtkListItem *list_item;
+    GtkWidget *expander;
+
+    list_item= GTK_LIST_ITEM(object);
+    row = gtk_list_item_get_item(list_item);
+    if (row != NULL) {
+        text = gtk_string_object_get_string(GTK_STRING_OBJECT(gtk_tree_list_row_get_item(row)));
+        expander = gtk_list_item_get_child(list_item);
+        gtk_expander_set_label(GTK_EXPANDER(expander), text);
+
+        // Disconnect previous signal handlers to avoid stacking them
+        //    TODO          g_signal_handlers_disconnect_by_func(expander, G_CALLBACK(on_tree_expander_toggled), row);
+
+        // Connect the signal handler
+        //    TODO          g_signal_connect(expander, "activate", G_CALLBACK(on_tree_expander_toggled), row);
+
+        gtk_widget_set_margin_start(expander, gtk_tree_list_row_get_depth(row)*20);
+        gboolean is_expanded = gtk_tree_list_row_get_expanded(row);
+        printf("[on_experimental_tree_bind_factory] here is %s content and expander is %d\n",
+               text,
+               is_expanded);
+    } else {
+        printf("[on_tree_bind_factory] here is NON content\n");
+    }
+}
diff --git a/hot.h b/hot.h
index bf329bb..cedd578 100644
--- a/hot.h
+++ b/hot.h
@@ -12,5 +12,7 @@
 #include "display.h"
 #include "contain.h"
 
-
-GtkBox *get_experimental_box_new();
+void on_experimental_tree_setup_factory (GtkSignalListItemFactory *factory,
+                            GObject* object,
+                            gpointer user_data);
+void create_experimental_tree (GtkBox *experimental_box);
diff --git a/hot.o b/hot.o
index 6329303..e4657a6 100644
Binary files a/hot.o and b/hot.o differ
diff --git a/myprogram b/myprogram
index da729da..b25064d 100755
Binary files a/myprogram and b/myprogram differ
diff --git a/tree.c b/tree.c
index c60975e..634a731 100644
--- a/tree.c
+++ b/tree.c
@@ -188,7 +188,7 @@ GListModel* ui_tree_create_model_func(GObject *item, gpointer root)
 }
 
 // Application activation callback
-static void ui_create_tree (GtkWidget *target_widget)
+void ui_create_tree (GtkWidget *target_widget)
 {
     GtkStringList *model;
     GtkTreeListModel *tree_model;
@@ -260,11 +260,3 @@ static void ui_create_tree (GtkWidget *target_widget)
     gtk_widget_set_visible(GTK_WIDGET(scrolled_window), TRUE);
     gtk_widget_set_visible(GTK_WIDGET(list_view), TRUE);
 }
-
-GtkBox *get_rules_user_tree_new(){
-  GtkBox *tree_sketch_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
-  gtk_box_append (tree_sketch_box, GTK_WIDGET (get_experimental_box_new()));
-  ui_create_tree (GTK_WIDGET (tree_sketch_box));
-  return tree_sketch_box;
-}
-
diff --git a/tree.h b/tree.h
index 38dc1b8..9fe09e2 100644
--- a/tree.h
+++ b/tree.h
@@ -7,4 +7,4 @@
 /*                                                                            */
 /******************************************************************************/
 
-GtkBox *get_rules_user_tree_new();
+void ui_create_tree (GtkWidget *target_widget);
diff --git a/tree.o b/tree.o
index c5934c5..67e6b4b 100644
Binary files a/tree.o and b/tree.o differ