# open a dock client
#####################################################################
-my $first = open_window($x, {
+my $first = open_window({
background_color => '#FF0000',
window_type => $x->atom(name => '_NET_WM_WINDOW_TYPE_DOCK'),
});
# Open a second dock client
#####################################################################
-my $second = open_window($x, {
+my $second = open_window({
background_color => '#FF0000',
window_type => $x->atom(name => '_NET_WM_WINDOW_TYPE_DOCK'),
});