diff --git a/c/gtk3/hide-n-seek/hidenseek.c b/c/gtk3/hide-n-seek/hidenseek.c
new file mode 100644
index 0000000..4a98243
--- /dev/null
+++ b/c/gtk3/hide-n-seek/hidenseek.c
@@ -0,0 +1,138 @@
+#include <gtk/gtk.h>
+
+
+const double pi = 3.141592653589793;
+
+GtkWidget *window;
+GtkWidget *fixed;
+GtkWidget *shape;
+gboolean play = TRUE;
+gboolean hidden = FALSE;
+
+int x = 58;
+int y = 75;
+double mouse_x = 0.0;
+double mouse_y = 0.0;
+
+
+gboolean timeout(gpointer data) {
+  if (play) {
+    int w, h;
+    gtk_widget_get_size_request(shape, &w, &h);
+    
+    if (x + w/2 < mouse_x) x += 5;
+    if (x + w/2 > mouse_x) x -= 5;
+    if (y + h/2 < mouse_y) y += 5;
+    if (y + h/2 > mouse_y) y -= 5;
+    
+    gtk_fixed_move(GTK_FIXED(fixed), shape, x, y);
+  }
+  return TRUE;
+}
+
+gboolean restart_timeout(gpointer data) {
+  play = TRUE;
+  gdk_window_set_cursor(gtk_widget_get_window(window), NULL);
+  gtk_widget_queue_draw(shape);
+  return FALSE;
+}
+
+gboolean shape_draw(GtkWidget *widget, cairo_t *cr, gpointer data) {
+  int w, h;
+  gtk_widget_get_size_request(widget, &w, &h);
+  
+  cairo_set_source_rgba(cr, 0, 0, 1, 1);
+  cairo_fill(cr);
+  
+  cairo_arc(cr, 10, 10, 10, -pi, -pi/2);
+  cairo_line_to(cr, w-10, 0);
+  cairo_arc(cr, w-10, 10, 10, -pi/2, 0);
+  cairo_line_to(cr, w, h-10);
+  cairo_arc(cr, w-10, h-10, 10, 0, pi/2);
+  cairo_line_to(cr, 10, h);
+  cairo_arc(cr, 10, h-10, 10, pi/2, pi);
+  cairo_line_to(cr, 0, 10);
+  
+  if (play) cairo_set_source_rgba(cr, 1, 1, 1, 1);
+       else cairo_set_source_rgba(cr, 1, 0, 0, 1);
+  cairo_fill_preserve(cr);
+
+  cairo_set_source_rgba(cr, 0, 0, 0, 1);
+  cairo_stroke(cr);
+
+  return TRUE;
+}
+
+gboolean shape_motion(GtkWidget *widget, GdkEventMotion *event, gpointer data) {
+  play = FALSE;
+
+  GdkCursor *cursor = gdk_cursor_new_from_name(gtk_widget_get_display(widget), "none");
+  gdk_window_set_cursor(gtk_widget_get_window(window), cursor);
+  g_object_unref(cursor);
+
+  gtk_widget_queue_draw(shape);
+  g_timeout_add(500, restart_timeout, NULL);
+  return TRUE;
+}
+
+gboolean window_motion(GtkWidget *widget, GdkEventMotion *event, gpointer data) {
+  if (!hidden) {
+    mouse_x = event->x;
+    mouse_y = event->y;
+  }
+  return TRUE;
+}
+
+gboolean shelter_enter(GtkWidget *widget, GdkEvent *event, gpointer data) {
+  hidden = TRUE;
+  return TRUE;
+}
+
+gboolean shelter_leave(GtkWidget *widget, GdkEvent *event, gpointer data) {
+  hidden = FALSE;
+  return TRUE;
+}
+
+void activate(GtkApplication* app, gpointer data) {
+  window = gtk_application_window_new(app);
+  g_signal_connect(window, "motion-notify-event", G_CALLBACK(window_motion), NULL);
+  gtk_widget_add_events(window, GDK_POINTER_MOTION_MASK);
+  gtk_window_set_default_size(GTK_WINDOW(window), 700, 500);
+  
+  fixed = gtk_fixed_new();
+  gtk_container_add(GTK_CONTAINER(window), fixed);
+  
+  shape = gtk_drawing_area_new();
+  g_signal_connect(shape, "draw", G_CALLBACK(shape_draw), NULL);
+  g_signal_connect(shape, "motion-notify-event", G_CALLBACK(shape_motion), NULL);
+  gtk_widget_add_events(shape, GDK_POINTER_MOTION_MASK);
+  gtk_widget_set_size_request(shape, 86, 61);
+  gtk_fixed_put(GTK_FIXED(fixed), shape, x, y);
+
+  GtkWidget *button1 = gtk_button_new_with_label("Sweet Home");
+  g_signal_connect(button1, "enter-notify-event", G_CALLBACK(shelter_enter), NULL);
+  g_signal_connect(button1, "leave-notify-event", G_CALLBACK(shelter_leave), NULL);
+  gtk_widget_add_events(button1, GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);
+  gtk_widget_set_size_request(button1, 249, 154);
+  gtk_fixed_put(GTK_FIXED(fixed), button1, 48, 296);
+  
+  GtkWidget *button2 = gtk_button_new_with_label("Another Safe Place");
+  g_signal_connect(button2, "enter-notify-event", G_CALLBACK(shelter_enter), NULL);
+  g_signal_connect(button2, "leave-notify-event", G_CALLBACK(shelter_leave), NULL);
+  gtk_widget_add_events(button2, GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);
+  gtk_widget_set_size_request(button2, 216, 131);
+  gtk_fixed_put(GTK_FIXED(fixed), button2, 344, 131);
+
+  gtk_widget_show_all(window);
+
+  g_timeout_add(10, timeout, NULL);
+}
+
+int main(int argc, char **argv) {
+  GtkApplication *application = gtk_application_new(NULL, 0);
+  g_signal_connect(application, "activate", G_CALLBACK(activate), NULL);
+  int status = g_application_run(G_APPLICATION(application), argc, argv);
+  g_object_unref(application);
+  return status;
+}
+