something.rb

require "rubygems"
require "RMagick"
require "rvg/rvg"

rvg = Magick::RVG.new(150, 100) do |canvas|
  canvas.background_fill = 'white'
  txt = canvas.text(140, 20).styles(
    :font_size => 28,
    :text_anchor => "end"
  )
  txt.tspan("first")
  txt.tspan("second")
end
rvg.draw.write("output.gif")