var i = 1, n = prompt('Nick?', '!!'),
  msg_text = prompt('Text of a message? (%i% stands for message id)', 'Message #%i%'),
  end_text = prompt('Text when the hacking ended? (%i% stands for message id)', '%i% message(s) sended successfully.'),
  msgs = parseInt(prompt('How many messages?',20)),
  time = parseInt(prompt('Amount of time?', 100)),
  t = setInterval(function() {
    if (i == msgs+1) ref.push({name: n, text: end_text.replace('%i%',i-1)}), clearInterval(t);
    else ref.push({name: n, text: msg_text.replace('%i%',i++)});