startshape A background {hue 270 sat 1 b -.9}

rule A { BAL {} A {x 1} }

rule A { BAL {} A {y 1} }

rule A { BAL {} A {x -1} }

rule A { BAL {} A {y -1} }

rule A .01 {}

rule BAL { CIRCLE {} BAL {s .99 x .0025 y .0025 b .05} }