executes promise in a sequence
var sequencer = require('sequencer-js')()
var bluebird = require('bluebird')
var globalVariable = 1
function aPromise(id, ts) {
return bluebird.delay(ts).then(function(){
globalVariable++
console.log(id, globalVariable)
})
}
sequencer.push(aPromise.bind(undefined, "first", 1000))
sequencer.push(aPromise.bind(undefined, "second", 10))