# stroke_width.rb

    #!/usr/local/bin/ruby18 -w

    require 'RMagick'

    imgl = Magick::ImageList.new
    imgl.new_image(500,80, Magick::HatchFill.new('white','lightcyan2'))

    gc = Magick::Draw.new

    # Draw 5-pixel wide line
    gc.stroke('LightPink')
    gc.stroke_width(5)
    gc.line(10,30, 130,30)

    # Draw 10-pixel wide line
    gc.stroke('LightSkyBlue2')
    gc.stroke_width(10)
    gc.line(130,30, 230,30)

    # Draw 20-pixel wide line
    gc.stroke('GreenYellow')
    gc.stroke_width(20)
    gc.line(230,30,370,30)

    # Draw 40-pixel wide line
    gc.stroke('MediumOrchid2')
    gc.stroke_width(40)
    gc.line(370,30,490,30)

    # Draw 1-pixel wide line through the center
    gc.stroke('black')
    gc.stroke_width(1)
    gc.line(10,30,490,30)

    # Annotate
    gc.fill('black')
    gc.stroke('transparent')
    gc.text(60,70,"'5'")
    gc.text(180,70,"'10'")
    gc.text(300,70,"'20'")
    gc.text(420,70,"'40'")

    gc.draw(imgl)
    imgl.border!(1,1,"lightcyan2")

    imgl.write('stroke_width.gif')
    exit

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