init({
range: [ [0, 12], [-1, 1] ]
});
label( [0, 0],
"\\Huge{\\color{#6495ED}{ A } - \\color{#FFA500}{ B } = {?}}",
"right" );
drawCircles( A, "#6495ED" );
crossOutCircles( A, B, "#FFA500" );
We began with plural( A, "dot" ) and crossed out B of them, so we are left with plural( A - B, "dot" ).