mandelbrot {
    xrange( -0.785,-0.78 );
    yrange(-0.141,-0.134 );
    maxiter( 2048 );
    spread_colours( 0,127,0,255,255,255,0,0 );
    spread_colours( 128,511,255,0,0,255,255,0 );
    spread_colours( 511,2047,255,255,0,255,255,255 );
    spread_colours( 0,0,0,0,0,0,0,0 );

    show( bsm );
    };

