Basic Chrome/Selenium login with Ruby

simple_login.rb

require "selenium-webdriver"

driver = Selenium::WebDriver.for :chrome
wait = Selenium::WebDriver::Wait.new(:timeout => 18)
driver.navigate.to "https://someloginsite.web"
sleep 2
element = driver.find_element(:class, "username")
element.send_keys "[email protected]"
pwd = driver.find_element(:class, "password")
pwd.send_keys "MyPasswords"
submit_btn = $driver.find_element(name: "submit")
submit_btn.click
sleep 3
puts $driver.title