diff --git a/dwss.c b/dwss.c
index b1e9688..5461737 100644
--- a/dwss.c
+++ b/dwss.c
@@ -39,6 +39,8 @@
 #include <gtk/gtk.h>
 #include <gtk/gtkgl.h>
 
+#include <GL/gl.h>
+
 #include "gs-theme-window.h"
 
 static gchar *geometry = NULL;
@@ -50,6 +52,61 @@ static GOptionEntry options[] = {
        {NULL}
 };
 
+static gboolean
+expose (GtkWidget *da, GdkEventExpose *event, gpointer user_data)
+{
+    GdkGLContext *glcontext = gtk_widget_get_gl_context(da);
+    GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
+
+    if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
+    {
+        g_assert_not_reached();
+    }
+
+    glBegin(GL_QUADS);
+    glColor3f(1, 0.6, 0);
+    glNormal3f(0, 0, 1);
+    glVertex2f(1, 1);
+    glVertex2f(-1, 1);
+    glVertex2f(-1, -1);
+    glVertex2f(1, 0);
+    glEnd();
+
+    if (gdk_gl_drawable_is_double_buffered(gldrawable))
+        gdk_gl_drawable_swap_buffers(gldrawable);
+    else
+        glFlush();
+
+    gdk_gl_drawable_gl_end(gldrawable);
+
+    return TRUE;
+}
+
+static gboolean
+configure (GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
+{
+    GdkGLContext *glcontext = gtk_widget_get_gl_context(da);
+    GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
+
+    if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
+    {
+        g_assert_not_reached();
+    }
+
+    glViewport(0, 0, da->allocation.width, da->allocation.height);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+
+    glMatrixMode(GL_MODELVIEW);
+
+    glShadeModel(GL_SMOOTH);
+
+    gdk_gl_drawable_gl_end(gldrawable);
+
+    return TRUE;
+}
+
 int
 main (int   argc,
       char *argv[])
@@ -101,6 +158,11 @@ main (int   argc,
         g_assert_not_reached();
     }
 
+    g_signal_connect(drawing_area, "configure-event",
+            G_CALLBACK(configure), NULL);
+    g_signal_connect(drawing_area, "expose-event",
+            G_CALLBACK(expose), NULL);
+
     gtk_widget_show (drawing_area);
     gtk_container_add (GTK_CONTAINER (window), drawing_area);