Context Free Art - 9

ひさびさに。

size { s 100 100 }

startshape main
rule main {
    4 * { r 90 } aa {}
}
 
rule aa {
    bb {}
    bb { flip 0 }
}
 
rule bb {
    100 * { x 1 } CIRCLE { s .5 h 100 sat .8 b .65 }
    bb { y 1 s .99  h -5 }
}