diff --git a/cold.c b/cold.c
index d3d05ca..f3b765d 100644
--- a/cold.c
+++ b/cold.c
@@ -38,6 +38,20 @@ void window_bar(GtkWindow *window, char *title){
     button = gtk_button_new_with_label (" I ");               n fois
     gtk_grid_attach (GTK_GRID (grid), button, 0, 0, 1, 1);    n fois  */
 
+/*
+ * gtk_paned_new (GTK_ORIENTATION_VERTICAL or GTK_ORIENTATION_VERTICAL)
+ * GtkPaned has two panes, arranged either horizontally or vertically.
+ * The division between the two panes is adjustable by the user by dragging a handle.
+ * Child widgets are added to the panes of the widget
+ *                         with gtk_paned_pack1() and gtk_paned_pack2().
+ */
+
+/*
+ * GtkWidget* gtk_box_new (GtkOrientation orientation, gint spacing)
+ */
+
+
+
 
 
 /* TODO or NOT TODO
diff --git a/exec.o b/exec.o
index b1ef0da..9e1c748 100755
Binary files a/exec.o and b/exec.o differ
diff --git a/hot.c b/hot.c
index b7f0285..ee69459 100644
--- a/hot.c
+++ b/hot.c
@@ -1,4 +1,3 @@
 #include <stdio.h>
 #include <gtk-4.0/gtk/gtk.h>
 
-
diff --git a/hot.h b/hot.h
index a36a9c4..6ad2592 100644
--- a/hot.h
+++ b/hot.h
@@ -4,40 +4,53 @@
 #include "cold.h"
 
 void activate (GtkApplication *app, gpointer user_data) {
-  GtkWindow *window   = GTK_WINDOW (gtk_application_window_new (app));
+  GtkWindow *window = GTK_WINDOW (gtk_application_window_new (app));
   window_bar (window, "window");
-  GtkWidget *grid     = gtk_grid_new();
+  GtkWidget *grid = gtk_grid_new();
   gtk_window_set_child (window, grid);
 
   click_print_do (NULL,   grid, "(I)",  "n°1\n",   0,0,1,1);
   click_print_do (NULL,   grid, "(II)", "n°2\n",   1,0,1,1);
-  click_print_do (window, grid, "Quit", "bye !\n", 2,0,1,2);
+  click_print_do (window, grid, "Quit", "bye !\n", 2,0,1,1);
 
   GtkWidget *switcher = gtk_stack_switcher_new();
 //  GtkWidget *sidebar  = gtk_stack_sidebar_new();
-  gtk_grid_attach (GTK_GRID (grid), switcher, 0, 2, 2, 1);
+  gtk_grid_attach (GTK_GRID (grid), switcher, 0, 1, 3, 1);
   gtk_orientable_set_orientation (GTK_ORIENTABLE (switcher), GTK_ORIENTATION_VERTICAL);
   gtk_orientable_set_orientation (GTK_ORIENTABLE (switcher), GTK_ORIENTATION_HORIZONTAL);
   GtkStack *stack = GTK_STACK (gtk_stack_new());
   gtk_stack_switcher_set_stack (GTK_STACK_SWITCHER (switcher), stack);
 //  gtk_stack_sidebar_set_stack (GTK_STACK_SIDEBAR (sidebar), stack);
 
-  GtkWidget *page_0   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
-  GtkWidget *page_1   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
-  gtk_stack_add_titled (stack, page_0, "n°0", "A");
-  gtk_stack_add_titled (stack, page_1, "n°1", "B");
+//  GtkWidget *page_0   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
+//  GtkWidget *page_1   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
+  GtkWidget *box_0    = gtk_box_new (0, 0);
+  GtkWidget *box_1    = gtk_box_new (0, 0);
+  GtkWidget *box_2    = gtk_box_new (0, 0);
+  GtkWidget *box_3    = gtk_box_new (0, 0);
+  gtk_box_append (GTK_BOX (box_0), gtk_button_new_with_label ("00"));
+  gtk_box_append (GTK_BOX (box_0), gtk_button_new_with_label ("01"));
+  gtk_box_append (GTK_BOX (box_1), gtk_button_new_with_label ("10"));
+  gtk_box_append (GTK_BOX (box_1), gtk_button_new_with_label ("11"));
+  gtk_box_append (GTK_BOX (box_2), gtk_button_new_with_label ("20"));
+  gtk_box_append (GTK_BOX (box_2), gtk_button_new_with_label ("21"));
+  gtk_box_append (GTK_BOX (box_3), gtk_button_new_with_label ("30"));
+  gtk_box_append (GTK_BOX (box_3), gtk_button_new_with_label ("31"));
+  gtk_stack_add_titled (stack, box_0, "n°0", "A");
+  gtk_stack_add_titled (stack, box_1, "n°1", "B");
+  gtk_stack_add_titled (stack, box_2, "n°2", "C");
+  gtk_grid_attach (GTK_GRID (grid), box_3, 0, 2, 1, 1);
 
-  GtkWidget *box_1    = gtk_box_new (0, 6); // 6 = spacing
 
-  GtkStackPage *page_2 =  gtk_stack_add_titled (stack, box_1, "any name", "C");
-  gtk_stack_page_set_name (page_2, "n°2");
+//  GtkStackPage *page_2 =  gtk_stack_add_titled (stack, box_1, "any name", "C");
+//  gtk_stack_page_set_name (page_2, "n°2");
+
+  GtkSelectionModel *stack_selection_model = gtk_stack_get_pages (stack);
+  gtk_selection_model_select_item (stack_selection_model, 1, 1);
 
   printf("selected page name is [%s]  (how do I get its title ?)\n",
           gtk_stack_get_visible_child_name (stack));
 
-  GtkSelectionModel *stack_selection_model = gtk_stack_get_pages (stack);
-  gtk_selection_model_select_item (stack_selection_model, 2, 1);
-
 //  gtk_stack_set_transition_type (GTK_STACK (stack), GTK_STACK_TRANSITION_TYPE_CROSSFADE);
 
   gtk_window_present (GTK_WINDOW (window));
diff --git a/warm.c b/warm.c
index 5e653bb..ee69459 100644
--- a/warm.c
+++ b/warm.c
@@ -1,14 +1,3 @@
-#include <unistd.h>
 #include <stdio.h>
 #include <gtk-4.0/gtk/gtk.h>
 
-/*             button_0 = gtk_button_new_with_label ("Quit");
-  GtkWidget *button_1 = gtk_button_new_with_label ("I");
-  GtkWidget *button_2 = gtk_button_new_with_label ("II");
-  GtkWidget *button_3 = gtk_button_new_with_label ("III");
-  GtkWidget *button_4 = gtk_button_new_with_label ("IV");
-  GtkWidget *button_5 = gtk_button_new_with_label ("V");*/
-
-//  GtkToggleButton *tb1 =  GTK_TOGGLE_BUTTON (gtk_button_new_with_label ("tb1"));
-
-