Async/Await is not working with node 4.x. Can i have the alternate?

Question

Getting below error when i try to use async/await with NodeJs 4.x. Any issue with the below sample code or should i use alternate ?

async function main ()

Answer 1

try async.js http://caolan.github.io/async/

var async = require("async");  
async.map(['file1','file2','file3'], fs.stat, function(err, results) {
    // results is now an array of stats for each file
});

async.parallel([
    function(callback) { ... },
    function(callback) { ... }
], function(err, results) {
    // optional callback
});