mandelbrot {
    xrange( -0.79,-0.77 );
    yrange( -0.14,-0.13 );
    maxiter( 2048 );
    set_lightpos( -1,-2,2 );
    spread_colours( 0,127,255,0,0,255,255,0 );
    spread_colours( 128,511,255,255,0,0,0,255 );
    spread_colours( 511,2047,0,0,255,0,0,255 );
    spread_colours( 0,0,0,0,0,0,0,0 );

    show( bsm );
    };

