mandelbrot {
    xrange( -0.7825,-0.7823 );
    yrange( -0.1378,-0.1376 );
    maxiter( 1024 );
    spread_colours( 0, 511,255,255,0,0,0,255 );
    spread_colours( 512,1023,0,0,255,255,255,255 );
    spread_colours( 0,0,0,0,0,0,0,0 );

    show( bsm );
    };

