width = 600
height = 600

nesting = 5

startshape Circles

rule Circles {
  FourCircles
  SQUARE  //this will be drawn just once
}

rule FourCircles {
  CIRCLE {x 1.5 s 0.7}
  CIRCLE {x -1.5 s 0.7}
  CIRCLE {y 1.5 s 0.7}
  CIRCLE {y -1.5 s 0.7}
  FourCircles {x 1.5 s 0.5}
  FourCircles {x -1.5 s 0.5}
  FourCircles {y 1.5 s 0.5}
  FourCircles {y -1.5 s 0.5}
}