gistfile1.rb

require 'twitter'
Twitter.configure do |config|
  config.consumer_key = YOUR_CONSUMER_KEY
  config.consumer_secret = YOUR_CONSUMER_SECRET
  config.oauth_token = YOUR_OAUTH_TOKEN
  config.oauth_token_secret = YOUR_OAUTH_TOKEN_SECRET
end
s = nil
while true
  if IO.popen('pbpaste', 'r+').read != s
    s = IO.popen('pbpaste', 'r+').read
    Twitter.update(s)
  end
  sleep 5
end