Draw background problem

programming flash
1

hey i want to have a background grid so i came up with this:

this.createEmptyMovieClip("bg", 9999);
bg._visible = true;
var startHeight:Number = 4;
var startWidth:Number = 4;
function drawBG() {
 //bg.beginFill(0xffffff, 0);
 bg.lineStyle(1, 0x0F0F0F, 100);
 bg.moveTo(0, startHeight);
 bg.lineTo(Stage.width, startHeight);
 startHeight = startHeight+4;
 bg.endFill();
 if (startHeight>=Stage.height) {
  clearInterval(drawBGInterval);
  drawBGInterval = setInterval(drawBGvertical, 1);
 }
}
function drawBGvertical() {
 //bg.beginFill(0xffffff, 0);
 bg.lineStyle(1, 0x0F0F0F, 100);
 bg.moveTo(startWidth, 0);
 bg.lineTo(startWidth, Stage.height);
 startWidth = startWidth+4;
 bg.endFill();
 if (startWidth>=Stage.width) {
  
  clearInterval(drawBGInterval);
  bg._visible = true;
 }
}
drawBGInterval = setInterval(drawBG, 1);

it does what i want but isnt efficient… any thoughts? i dont mind losing the draw thing it can just appear.Another thing, it has to appear behind everything and must be redrawn everytime someone resizes the stage…
i would really appreciate some help :expressionless: