up_vote_down_vote.rb

require 'sinatra'
#this is the number that goes up or down in value 
$thing = 1

#this gets the index page
#
get "/" do
 erb :index
 #the link to this gist code => https://gist.github.com/ceejaay/801c2e5de59710b1a402#file-index-erb
end

#this is the put request to down vote
put "/thing2" do
  $thing = $thing - 1
  redirect back
end

#this is the put request to up vote
put "/thing1" do
  $thing += 1
  redirect back
end