How about something like this. It make need some tweaking. If you don't want to outline the flowers in the center of the big blocks you could continue the arches? Add some stippling in certain areas you want to recede?
[IMG]
http://img.skitch.com/20100903-gwt1k...wxmmr2sh7t.jpg[/IMG] You could use a circular template, bowl, jar, lid etc. to mark the arches. You could maybe even do them with your walking foot and not need to use FMQ unless you want to outline the flowers.