Create a form style layout for a PDF using Prawn

form.rb

require "prawn"

Prawn::Document.generate("form.pdf") do
  move_down 5
  text "Application form", style: :bold, size: 25

  bounding_box([0,cursor], width: bounds.width, height: 120) do
    fill_color  "DCDCDC"
    fill_rectangle [0, cursor], bounds.right, bounds.top
    fill_color  "000000"
    transparent(0.5) { stroke_bounds }
    
    move_down 10
    
    float do      
      bounding_box([5, cursor], width: 250, height: 200) do
        ["First name(s):", "Last name:", "Address line 1:", "Address line 2:"].each do |label|
          pad(5) { text label }
        end
      end
    end

    bounding_box([260, cursor], width: 250, height: 200) do
      stroke_color "000000"
      fill_color  "ffffff"
      4.times do 
        fill_and_stroke_rectangle([5, cursor], 240, 18) 
        move_down 24
      end
    end    
  end      
end