showpoly inside class

[Linkishback]

Hi, I'm making a class to draw basic shapes but it won't draw!

CLASS: player-drawing

NPC Code:

---

//#CLIENTSIDE

public function showRect(id, x, y, width, height) {

  showpoly(id, {x, y, x+width, y, x+width, y+height, x, y+height});

  player.chat = "Nice rectangle!";

}

---

I call it by joining the class to the player and calling:

WEAPON: Gui

NPC Code:

---

player.showRect(201, 0,0,200,200);

---

Am I doing something wrong, or is it not posible to do this with a class?

Thanks!