ActionScript 3.0 :: Create A Simple Flash That Will Draw The Mandelbrot Set By Looping Through Coordinates?

I'm trying to create a simple flash that will draw the Mandelbrot set by looping through coordinates, sending those coordinates through iterations of the Mandelbrot function and drawing a line at those coordinates, who's color is dependent upon the amount of iterations taken. Here is that code:

ActionScript Code:
var dot:Sprite = new Sprite()
this.addChild(dot)
for (var X:int = 0; X <= 500; X++) { //Iteration for horizontal

[code]....