Handling a new window with Ruby Watir-Webdriver

See more:

Ruby

selenium

Thanks, for your help. I was told to quit that one and do a different POC.
Should be very simple, but again - doesn't work.

This should login to a website with Twitter.

browser = Watir::Browser.start 'http://www.12mass.com/'
browser.link(:class, 'priceLogin').click
sleep 2
browser.element(:class, 'loginTwitter').click
browser.window.last.use do
        browser.text_field(:id, 'username_or_email').set 'name'
        browser.text_field(:id, 'password').set 'pass'
       
        browser.button(:id, 'allow').click
    end

I get to a point where a new window opens, but I can't reach it and fill the credentials...