gistfile1.js

var EventEmitter = require('events').EventEmitter

var continuation = new EventEmitter()

var i   = 1
var end = 1000

var doThisManyTimes = function () {
  someAsyncFacilityYoureUsing(arg1, arg2 ..., function callback() {
    continuation.emit('continue')
  })
}

continuation.on('continue', function () {
  if (i++ < end) {
    doThisManyTime()
  }
})

doThisManyTimes()