#!/usr/bin/env ruby require "prawn" pdf = Prawn::Document.new pdf.line_width = 10 y = 100 [[10, 1, 0], [10, 5, 0], [10, 1, 10], [10, 5, 10], [10, 1, 1], [10, 5, 1], [10, 1, 2], [10, 5, 2], [20, 1, 0], [20, 5, 0], ].each do |length, space, …