var temporaryDrawing:Shape = new Shape();

addChild(temporaryDrawing);

temporaryDrawing.graphics.lineStyle(2, 0x666666, 1);

var myDrawing:Shape = new Shape();

addChild(myDrawing);

myDrawing.graphics.lineStyle(7, 0x33CC00, 1);

var mouseHolding:Boolean = false;

var clickedX:Number;

var clickedY:Number;

stage.addEventListener(MouseEvent.MOUSE_DOWN, mDown);

stage.addEventListener(MouseEvent.MOUSE_UP, mUp);

function mDown(MouseEvent):void{

mouseHolding = true;

clickedX = mouseX;

clickedY = mouseY;

myDrawing.graphics.moveTo(mouseX, mouseY);

temporaryDrawing.graphics.moveTo(mouseX, mouseY)}

function mUp(MouseEvent):void{

if (mouseY < 600){

myDrawing.graphics.lineTo(mouseX, mouseY)}

mouseHolding = false;

clearTemp()}

stage.addEventListener(MouseEvent.MOUSE_MOVE, mMove);

function mMove(MouseEvent):void{

if (mouseHolding && mouseY < 600){

clearTemp();

temporaryDrawing.graphics.lineTo(mouseX, mouseY)}}

function clearTemp():void{

temporaryDrawing.graphics.clear();

temporaryDrawing.graphics.lineStyle(2, 0x666666, 1)

temporaryDrawing.graphics.moveTo(clickedX, clickedY)}

myDrawing.graphics.clear();

myDrawing.graphics.clear();

myDrawing.graphics.lineStyle(7, 0x33CC00, 1);