# polyline01.rb

    require 'rvg/rvg'

    Magick::RVG.dpi = 90

    rvg = Magick::RVG.new(12.cm, 4.cm).viewbox(0, 0, 1200, 400) do |canvas|
        canvas.background_fill = 'white'
        canvas.desc = "Example polyline01 - increasingly larger bars"

        # Show outline of canvas using the 'rect' method
        canvas.rect(1195, 395, 1, 1).styles(:fill=>'none', :stroke=>'blue', :stroke_width=>2)

        canvas.polyline(50,375,
                        150,375,150,325,250,325,250,375,
                        350,375,350,250,450,250,450,375,
                        550,375,550,175,650,175,650,375,
                        750,375,750,100,850,100,850,375,
                        950,375,950,25,1050,25,1050,375,
                        1150,375).styles(:fill=>'none', :stroke=>'blue', :stroke_width=>10)

    end

    rvg.draw.write('polyline01.gif')

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