#ruby Mendelbrot 1924-2010
require 'chunky_png'
 
png = ChunkyPNG::Image.new(513, 257, ChunkyPNG::Color::TRANSPARENT)
 
(-128..128).each { |c|
  (-256..256).each { |d|
    a = b = 0.0
    result = (1..70).each_with_index.find { 
      t = a * b
      a *= a
      b *= b
      a = a - b + d / 256.0 - 0.5;
      b = 2 * t + c / 128.0;
      a + b > 2 || (a + b).nan?
    }
    png[d + 256, c + 128] = result ? ChunkyPNG::Color.rgba(0, (result.last * 2.55).to_i, 0, 255) : ChunkyPNG::Color('black')
  }
}
 
png.write(STDOUT)

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