Done on the knee progressbar

custom-progressbar.js

var chalk = require('chalk');
var readline = require('readline');
var BAR_LENGTH = 40;
var lines = 0;

function repeatStr(str, len){
  return new Array(parseInt(len) + 1).join(str);
}

function drawBarLine(fill, str){
  return (
    chalk.bgBlue(repeatStr(' ', fill)) +
    chalk.bgWhite(repeatStr(' ', BAR_LENGTH - fill)) +
    ' ' + (str || '')
  );
}

function createProgress(title){
  var line = lines;
  lines += 2;
  process.stdout.write(title + '\n' + drawBarLine(0) + '\n');
  return {
    update: function(percent, comment){
      var offset = lines - line - 1;
      readline.moveCursor(process.stdout, 0, -offset);
      readline.clearLine(process.stdout, 0);

      process.stdout.write(drawBarLine(Math.round((percent / 100) * BAR_LENGTH), comment) + '\r');

      readline.moveCursor(process.stdout, 0, offset);
    }
  };
}

usage.js

['task1', 'task2', 'task3'].forEach(function(name){
  var bar = createProgress(name);
  var percent = 0;

  function tick(){
    percent++;
    bar.update(percent, 'some comment: ' + percent + '%');
    if (percent < 100)
      setTimeout(tick, 100 * Math.random());
  }

  setTimeout(tick, 100);
});