# OrigCoordSys.rb

    require 'rvg/rvg'

    rvg = Magick::RVG.new(400, 150) do |canvas|
        canvas.desc = "Example OrigCoordSys - Simple transformations: original picture"
        canvas.background_fill = 'white'

        canvas.g.styles(:fill=>'none', :stroke=>'black', :stroke_width=>3) do |grp|
            # Draw the axes of the original coordinate system
            grp.line(0, 1.5, 400, 1.5)
            grp.line(1.5, 0, 1.5, 150)
        end

        canvas.text(30, 30, 'ABC (orig coord system)').styles(:font_size=>20, :font_family=>'Verdana')

    end

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

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