diff --git a/balls.c b/balls.c
index 9f1967c..4e8b3d9 100644
--- a/balls.c
+++ b/balls.c
@@ -140,15 +140,22 @@ static void update_state () {
 static GtkWidget * window;
 static cairo_t * cr = 0;
 
+static int gravity_vector_countdown = 0;
+static int gravity_vector_init = 300;
+
 static void draw_gravity_vector() {
-    cairo_new_path(cr);
-    cairo_move_to(cr, width/2, height/2);
-    cairo_line_to(cr, width/2 + g_x, height/2 + g_y);
-    cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
-    cairo_set_line_width(cr, 1.0);
-    cairo_stroke(cr);
-    cairo_arc(cr, width/2 + g_x, height/2 + g_y, 3, 0, 2*M_PI);
-    cairo_fill(cr);
+    if (gravity_vector_countdown != 0) {
+	cairo_new_path(cr);
+	cairo_move_to(cr, width/2, height/2);
+	cairo_line_to(cr, width/2 + g_x, height/2 + g_y);
+	cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
+	cairo_set_line_width(cr, 1.0);
+	cairo_stroke(cr);
+	cairo_arc(cr, width/2 + g_x, height/2 + g_y, 3, 0, 2*M_PI);
+	cairo_fill(cr);
+	if (gravity_vector_countdown > 0)
+	    --gravity_vector_countdown;
+    }
 }
 
 static void draw_balls_onto_window () {
@@ -194,20 +201,23 @@ static gint keyboard_input (GtkWidget *widget, GdkEventKey *event) {
     switch(event->keyval) {
     case GDK_KEY_Up:
 	g_y -= 10;
+	gravity_vector_countdown = gravity_vector_init;
 	break;
     case GDK_KEY_Down:
 	g_y += 10;
+	gravity_vector_countdown = gravity_vector_init;
 	break;
     case GDK_KEY_Left:
 	g_x -= 10;
+	gravity_vector_countdown = gravity_vector_init;
 	break;
     case GDK_KEY_Right:
 	g_x += 10;
+	gravity_vector_countdown = gravity_vector_init;
 	break;
-    case GDK_KEY_F:
-    case GDK_KEY_f:
-	g_x = rand() % 201 - 100;
-	g_y = rand() % 201 - 100;
+    case GDK_KEY_G:
+    case GDK_KEY_g:
+	gravity_vector_countdown = gravity_vector_init;
 	break;
     case GDK_KEY_Q:
     case GDK_KEY_q: