download links from page with mechanize

gistfile1.rb

require 'mechanize'
require 'open-uri'

url = 'http://33.33.33.11/nicoleandjason.us/links'
agent = Mechanize.new

page = agent.get(url)

page.links.each_with_index do |link, index|
  id = rand(100) * index
  image_page = link.click
  image_page.search('.field-name-field-instf-image-url').each do |field|
    field.css('a').each do |link|
      puts link.attributes['href']
      File.open("images/#{id}.jpg", 'wb') do |file|
        file.write open(link.attributes['href'].to_s).read
      end 
    end 
  end 
end