Flow/test/index.js

function makeid(n) {
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  const d = new Date()

  text += possible[d.getMilliseconds() % possible.length]
  text += possible[d.getSeconds()]
  text += possible[d.getMinutes()]
  text += possible[d.getDate()]
 
  for (var i = 0; i < n; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

console.log(makeid(5))