WITH RECURSIVE xaxis(x) AS (

  VALUES(cast(-2.0 as double))

  UNION ALL SELECT x + 0.05 FROM xaxis WHERE x < 1.2

),

yaxis(y) AS (

  VALUES(cast(-1.0 as double))

  UNION ALL SELECT y + 0.1 FROM yaxis WHERE y < 1.0

),

m(iter, cx, cy, x, y) AS (

  SELECT 0, x, y, cast(0.0 as double), cast(0.0 as double)

    FROM xaxis, yaxis

  UNION ALL

    SELECT iter + 1, cx, cy, x * x - y * y + cx, 2.0 * x * y + cy

      FROM m

      WHERE (x * x + y * y) < 4.0 AND iter < 38

),

m2(iter, cx, cy) AS (

  SELECT max(iter), cx, cy FROM m GROUP BY cx, cy

),

a(t) AS (

  SELECT

    group_concat(

      substr(' ░▒▓█', 1 + least(floor(iter / 7.0), 4), 1)

      ORDER BY cx SEPARATOR ''

    )

    FROM m2 GROUP BY cy

)

SELECT replace(t, ' ', x'e29681e280af') 'Mandelbrot' FROM a;