require 'rvg/rvg'
Magick::RVG.dpi = 90
rvg = Magick::RVG.new(12.cm, 4.cm) do |canvas|
canvas.viewbox(0, 0, 1200, 400)
canvas.background_fill = 'white'
canvas.desc = "Example circle01 - circle filled with red and stroked with blue"
# Show outline of canvas using the 'rect' method
canvas.rect(1195, 395, 1, 1).styles(:fill=>'none', :stroke=>'blue', :stroke_width=>2)
canvas.circle(100, 600, 200).styles(:fill=>'red', :stroke=>'blue', :stroke_width=>10)
end
rvg.draw.write('circle01.gif')