Draw over a movieclip - actionscript-3

Question

I have a paint application. I want to put a layer(movieclip with a square) and I want to draw over it.
Until now I cant paint but when I'm trying to add movieclip child, I cant draw over that movieclip. Which is the way to make something like this?
This is my code:
import flash.display.Sprite;
var myThick=10;
var currentColor = 0X000000;
var myCanvas:Sprite;
init();
function init():void {
drawCanvas();
var clearSwatch:Sprite = new Sprite();
clearSwatch.graphics.beginFill(0xFFFFFF);
clearSwatch.graphics.lineStyle(2, 0x000000);
clearSwatch.graphics.drawCircle(30, 370, 20);
clearSwatch.graphics.endFill();
addChild(clearSwatch);
clearSwatch.buttonMode = true;
clearSwatch.addEventListener(MouseEvent.CLICK, clearCanvas);//clear
}
function drawCanvas():void {
myCanvas = new Sprite();
myCanvas.graphics.beginFill(0xF0F0F0);
myCanvas.graphics.drawRect(60, 20, stage.stageWidth-80, stage.stageHeight+40);
myCanvas.graphics.endFill();
myCanvas.graphics.lineStyle(myThick, currentColor);
addChild(myCanvas);
myCanvas.addEventListener(MouseEvent.MOUSE_DOWN, startDraw);
//stage.addEventListener(MouseEvent.MOUSE_UP, stopDraw);
myCanvas.buttonMode = true;
}
function startDraw(event:MouseEvent):void {
myCanvas.graphics.moveTo(event.localX, event.localY);
myCanvas.addEventListener(MouseEvent.MOUSE_MOVE, paintLine);
}
function stopDraw(event:MouseEvent):void {
myCanvas.removeEventListener(MouseEvent.MOUSE_MOVE, paintLine);
}
function paintLine(event:MouseEvent):void {
myCanvas.graphics.lineTo(event.localX, event.localY);
event.updateAfterEvent();
}
function clearCanvas(event:MouseEvent):void {
myCanvas.graphics.clear();
drawCanvas();
}
How can I make it work?
thank you!

Answer 1

Add both listeners to stage, along with mouse move listener, but use graphics commands over myCanvas.
stage.addEventListener(MouseEvent.MOUSE_DOWN, startDraw);
function startDraw(event:MouseEvent):void {
myCanvas.graphics.moveTo(event.localX, event.localY);
myCanvas.addEventListener(MouseEvent.MOUSE_MOVE, paintLine);
}
Etc.