# open a dock client
-my $window = open_window($x, {
+my $window = open_window({
background_color => '#FF0000',
window_type => $x->atom(name => '_NET_WM_WINDOW_TYPE_DOCK'),
});
# create a dock client with a 1px border
#####################################################################
-$window = open_window($x, {
+$window = open_window({
border => 1,
rect => [ 0, 0, 30, 20 ],
background_color => '#00FF00',