const webdriver = require('selenium-webdriver')
const chrome = require("selenium-webdriver/chrome");
const By = webdriver.By
const until = webdriver.until

var username = "XXX"
var password = "XXX"

function login(username, password) {
    driver.wait(until.elementLocated(By.id('Email')))
    driver.findElement(By.id('Email')).sendKeys(username)
    driver.findElement(By.id('next')).click()
    driver.wait(until.elementLocated(By.id('Passwd')), 5000)
    driver.findElement(By.id('Passwd')).sendKeys(password)

    // open a REPL here to examine elements, try things, etc.

    driver.findElement(By.id('signIn')).click()
}

var driver = new webdriver.Builder()
        .withCapabilities({'browserName': 'chrome'}).build()
driver.get('https://gmail.com')
login(username, password)