Prawn::Document.generate("raw_lines.pdf", :skip_page_creation => true) do  
  # SET UP A PAGE 
  @page_content = ref(:Length => 0) 
  @current_page = ref(:Type      => :Page, 
                      :Parent    => @pages, 
                      :MediaBox  => [0, 0, 612.0, 792.0], 
                      :Contents  => @page_content) 
 
  # ADD IT TO THE PAGE LIST 
  @pages.data[:Kids] << @current_page 
  @pages.data[:Count] += 1 
 
  # SAVE GRAPHICS STATE 
  add_content "q" 
 
  # SET UP FILL / STROKE COLOR 
  add_content "0 0 0 rg" 
  add_content "0 0 0 rg" 
                           
  add_content("36 756 m")  # move 
  add_content("576 36 l")  # draw path 
  add_content("S") # stroke 
 
  # RESTORE GRAPHICS STATE 
  add_content "Q" 
end