A small sample snippet to use Shoes.url.

shoes_url_sample.rb

class PhotoFrame < Shoes
  url '/', :index
  url '/a', :a
  url '/b', :b
  url '/c', :c
  
  def index
    a
  end
  
  def a
    para 'This is a. Go to b after 3sec'
    timer(3){visit '/b'}
  end
  
  def b
    para 'This is b. Go to c if you press space bar.'
    keypress{|k| visit '/c' if k == ' '}
  end
  
  def c
    para 'This is c. Go back a if you press space bar.'
    keypress{|k| visit '/a' if k == ' '}
  end
  
end

Shoes.app