# color_floodfill.rb

    #!/usr/local/bin/ruby18 -w
    require 'RMagick'

    # Demonstrate the Image#color_floodfill method

    before = Magick::Image.new(200,200) { self.background_color = 'white' }
    before.border!(1,1,'black')

    circle = Magick::Draw.new
    circle.fill('transparent')
    circle.stroke_width(2)
    circle.stroke('black')
    circle.circle(100,100,180,100)
    circle.fill('plum1')
    circle.stroke('transparent')
    circle.circle( 60,100, 40,100)
    circle.circle(140,100,120,100)
    circle.circle(100, 60,100, 40)
    circle.circle(100,140,100,120)
    circle.draw(before)

    before.write('color_floodfill_before.gif')

    aquamarine = Magick::Pixel.from_color('aquamarine')
    after = before.color_floodfill(100,100, aquamarine)

    after.write('color_floodfill_after.gif')
    exit

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