Trying to make a Timer

[Stowen]

Hello. I'm trying to make a countdown timer, but it doesn't seem to be working. I'm also not sure of the best way to go about it.

Here is what I have so far:

PHP Code:

//#CLIENTSIDE
function onCreated() {
  this.timer == 15;
  this.chat = "Countdown";
}

function onPlayerChats() {
  if (player.chat == "/count") {
    this.timer == 15;
    onTimeOut();
  }
}

function onTimeOut() {
  this.timer - 1;
  this.chat = this.timer;
  setTimer(1);
}