5minutes.js

// An Import
var _ = require('lodash')

// A function
const times2 = (x) => {
  return 2 * x
}

// An Object
const o = {
  foo: 'bar',
  1: {2: 2},
}
console.log(o)

// A function call
console.log(times2(3))

// A callback
setTimeout(() => {
  console.log("Hello, slow world.")
}, 2000)