read from input, write to output create dir then remove it

readWriteFile.js

var fs = require('fs');

var file = fs.createReadStream('./input.txt', {flags: 'r'} );
var out = fs.createWriteStream('./output.txt', {flags: 'w'});
file.pipe(out);


var fs = require('fs');
fs.mkdir('./newdir', 0666, function(err) {
  if(err) throw err;
  console.log('Created newdir');
  fs.rmdir('./newdir', function(err) {
    if(err) throw err;
    console.log('Removed newdir');
  });
});