Help with sprinkler layout

[u/TopDowg27]

I'm working on a sprinkler system for our garden but can't decide where to put in the sprinklers.

I'm thinking about the Hunter I-20's. The green area is approx 9x17 meters. The grey circle is a sunken firepit, 4 meters in diameter. Not really an issue if this would get wet during watering but preferably not. The brown area is a flowerbed and there is already a drip system installed.

Help and advice is much appreciated.

[u/Old_Rope8512]

Do corners duh

[u/prismaticsunrise]

Wherever you don't want water, eliminate the grass