John's Garden #7 - parterre redevelopment

It's been over 3 years that I have been dithering about this part of the garden - I call it John's Garden or John's Jungle.

I have decided that I would like to use this area for some formal parterre. I'd like some ball topiary, and murraya hedges in squares, like so

I could maybe put in some more mini-murraya to make crosses, like this: 

There are trees inside the patches, but that's ok. I will need another few star-jasmine's to fill

in the spaces inside the borders. I could also have some white lavender in the spaces too, to cut down on weed growth.

Will use these white long bricks to demarcate the areas.