How to Generate a Prawn PDF class with a repeating footer

kyles_super_cool_pdf.rb

class KylesSuperCoolPdf < Prawn::Document

  def initialize
    super()

    repeat :all do
      #Create a bounding box and move it up 18 units from the bottom boundry of the page
      bounding_box [bounds.left, bounds.bottom + 18], width: bounds.width do
        text "Probably the Best Footer Ever", size: 8, align: :center
      end
    end
    
    #Create another box that is placed on the page after our footer is
    bounding_box [bounds.left, bounds.top], width: bounds.width, height: bounds.height - 16 do
      #Generate the rest of your PDF content here
    end
  end

end