untitled.js

var createCounter = (startVal = 0) => {
	let state = startVal
	return {
		next: () => {
			if(state < (10 + startVal))
				return {value: state+=1}
			return {done: true}
		}
	}
}

var counter = createCounter(5)
var {done, value} = counter.next()
while(!done) {
		console.log(value)
		const x = counter.next()
		done = x.done
		value = x.value
}