Paste this in here: http://babeljs.io/repl/#?experimental=true&evaluate=true&loose=false&spec=false&playground=false

range.js

function* range (start, end) {
  while (start < end) yield start++ 
}

let [ a, b, c, d, e, f, g] = range(0, 10)

console.log(a, b, c, d, e, f, g)
console.log(...range(0, 10))