Changing text in timeout.

[Emera]

I am working on a staff boots script for Lexia, and I don't want it to be just an old boring staff boots script, so I have added a little display to tell you your speed and to also show a little staff boots image too. Here is what the display says.

NPC Code:

---

Speed: 1

---

It is reading the speed. However, when I press the = key (increase speed), it doesn't recognise that the speed has changed at all and still shows 1;
Here is the code.

PHP Code:

//#CLIENTSIDE
function onKeyPressed(code, Key) {
  if (Key == "z") {
    setTimer(0.05);
    if (this.mode == 0) {
      this.mode = 1;
      player.chat = "On";
      this.speed = 1;
    } else {
      this.mode = 0;
      player.chat = "Off";
    }
  }
  if (Key == "=") {
    this.speed = this.speed + 1;
  }
}

function onTimeout() {
  if (this.mode == 1) {
    showingimage();
    for (temp.key = 0; key < 4; key++) {
      if (keydown(key)) {
        player.x += (vecx(key) * this.speed);
        player.y += (vecy(key) * this.speed);
      }
    }
  }
  if (this.mode == 0) {
    hidingimage();
  }
  setTimer(0.05);
}

function ShowingImage() {
  with(findimg(200)) {
    image = "wboots.png";
    layer = 4;
    x = screenwidth / 2 - 675;
    y = screenheight - 610;
  }
  with(findimg(201)) {
    text = "Speed: " @ this.speed;
    x = screenwidth / 2 - 638;
    y = screenheight - 601;
    zoom = 0.7;
    layer = 4;
  }
}

function HidingImage() {
  hideimg(200);
  hideimg(201);
} 


The code isn't finished yet, as you can see there is no way to decrease speed and the display is still very simple. The display is attached below.