startshape THINGY

rule THINGY {

MINICIRCLE {}
THINGY {x 1 size 0.5}
THINGY {x -1 size 0.5}
THINGY {y 1 size 0.5}
THINGY {y -1 size 0.5}

}

rule MINICIRCLE {

CIRCLE { size 0.5}

}