diff --git a/exec b/exec
index 17423c4..5058b60 100755
Binary files a/exec and b/exec differ
diff --git a/main.c b/main.c
index 8d9feb5..9b1ec91 100755
--- a/main.c
+++ b/main.c
@@ -1,33 +1,38 @@
 #include <gtk/gtk.h>
 
-static void print (GtkWidget *widget, gpointer   data) {g_print (data);}
+static void print (GtkWidget *widget, gpointer data) {g_print (data);}
 
 static void activate (GtkApplication *app, gpointer user_data) {
   GtkWidget *window;
+  GtkWidget *grid;
   GtkWidget *button;
-  GtkWidget *box;
-/*  GtkBox       GtkGrid     GtkRevealer    GtkStack
- *  GtkOverlay   GtkPaned    GtkExpander    GtkFixed  */
+
   window = gtk_application_window_new (app);
   gtk_window_set_title (GTK_WINDOW (window), "Window");
-  gtk_window_set_default_size (GTK_WINDOW (window), 200, 200);
 
-  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-  gtk_widget_set_halign (box, GTK_ALIGN_FILL);
-  gtk_widget_set_valign (box, GTK_ALIGN_CENTER); /*  START  CENTER  END  FILL */
-  gtk_window_set_child (GTK_WINDOW (window), box);
+   grid = gtk_grid_new ();
+   gtk_window_set_child (GTK_WINDOW (window), grid);
 
-  button = gtk_button_new_with_label ("Hello World !");
+  button = gtk_button_new_with_label (" I ");
+  g_signal_connect (button, "clicked", G_CALLBACK (print), "I'm n°1\n");
+  gtk_grid_attach (GTK_GRID (grid), button, 0, 0, 1, 1);
 
-  g_signal_connect (button, "clicked", G_CALLBACK (print), "Hi ! I'm there\n");
-//  g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+  button = gtk_button_new_with_label (" II ");
+  g_signal_connect (button, "clicked", G_CALLBACK (print), "I'm n°2\n");
+  gtk_grid_attach (GTK_GRID (grid), button, 1, 0, 1, 1);
 
-  gtk_box_append (GTK_BOX (box), button);
+  button = gtk_button_new_with_label ("Quit");
+  g_signal_connect (button, "clicked", G_CALLBACK (print), "bye !...\n");
+  g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+  gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 2, 1);
 
   gtk_window_present (GTK_WINDOW (window));
 }
 
-int main (int argc, char **argv) {
+int
+main (int    argc,
+      char **argv)
+{
   GtkApplication *app;
   int status;
 
@@ -38,3 +43,4 @@ int main (int argc, char **argv) {
 
   return status;
 }
+