$tmp = fresh_workspace;
-$first = open_floating_window($x, { background_color => '#ff0000' });# window 10
-$second = open_floating_window($x, { background_color => '#00ff00' }); # window 11
-$third = open_floating_window($x, { background_color => '#0000ff' }); # window 12
+$first = open_floating_window({ background_color => '#ff0000' });# window 10
+$second = open_floating_window({ background_color => '#00ff00' }); # window 11
+$third = open_floating_window({ background_color => '#0000ff' }); # window 12
sync_with_i3($x);