[FlexBuilder / ActionScript 3.0] Chess Timer

This is the source code for a simple chess timer (two players with alternating times) written in ActionScript 3.0 on the FlexBuilder platform.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
	<mx:Script>
		<![CDATA[
			import flash.events.*;
			import mx.controls.*;
			
			[Bindable]
			public var time1:String = "00:00";
			[Bindable]
			public var time2:String = "00:00";
			
			public var time1Front:int = 0;
			public var time1Rear:int = 0;
			public var time2Front:int = 0;
			public var time2Rear:int = 0;
			public var mainTimer:Timer = new Timer(1000);
			public var turn:Boolean = false;
			public var change:Boolean = false;
			
			private function startF():void 
			{
				if (!change)
				{
				mainTimer.start();
				mainTimer.addEventListener(TimerEvent.TIMER,timeChange);
				start.label = "Switch";
				change = true;
				} 
				else
				{
				turn = !turn;
				}
			}
			private function timeChange(e:TimerEvent):void
			{
				if (turn)
				{
					this.player1.setStyle("backgroundColor",0x00FF00);
					this.player2.setStyle("backgroundColor",0xFFFFFF);
					time1Rear++;
					if (time1Rear > 59)
					{
						time1Front++;
					}
					if (time1Front < 10)
					{
						time1 = "0" + time1Front.toString() + ":" + time1Rear.toString();
					}
					if (time1Rear < 10)
					{
						time1 = time1Front.toString() + ":0" + time1Rear.toString();
					}
					if (time1Front < 10 && time1Rear < 10)
					{
						time1 = "0" + time1Front.toString() + ":0" + time1Rear.toString();
					}
					if (time1Front > 10 && time1Rear > 10)
					{
						time1 = time1Front.toString() + ":" + time1Rear.toString();
					}				
				}
				else if (!turn)
				{
					this.player2.setStyle("backgroundColor",0x00FF00);
					this.player1.setStyle("backgroundColor",0xFFFFFF);
					time2Rear++;
					if (time2Rear > 59)
					{
						time2Front++;
					}
					if (time2Front < 10)
					{
						time2 = "0" + time2Front.toString() + ":" + time2Rear.toString();
					}
					if (time2Rear < 10)
					{
						time2 = time2Front.toString() + ":0" + time2Rear.toString();
					}
					if (time2Front < 10 && time2Rear < 10)
					{
						time2 = "0" + time2Front.toString() + ":0" + time2Rear.toString();
					}
					if (time2Front > 10 && time2Rear > 10)
					{
						time2 = time2Front.toString() + ":" + time2Rear.toString();
					}				
				}				
			}
			private function resetF():void
			{
				start.label = "Start";
				mainTimer.stop();
				change = false;
				this.player1.setStyle("backgroundColor",0xFFFFFF);
				this.player2.setStyle("backgroundColor",0xFFFFFF);
				time1 = "00:00";
				time2 = "00:00";
				time1Front = 0;
				time1Rear = 0;
				time2Front = 0;
				time2Rear = 0;
			}
		]]>
	</mx:Script>
	<mx:Button x="444" y="246" label="Start" click="startF();" id="start"/>
	<mx:Button x="583" y="246" label="Reset" click="resetF();" id="reset"/>
	<mx:Canvas x="199" y="37" width="300" height="170" id="player1" backgroundColor="#FFFFFF">
		<mx:Text x="106" y="10" text="Player 1" fontSize="20"/>
		<mx:Label x="85.5" y="49" text="{time1}" width="130" height="50" fontSize="20" textAlign="center"/>
	</mx:Canvas>
	<mx:Canvas x="583" y="37" width="300" height="170" id="player2" backgroundColor="#FFFFFF">
		<mx:Text x="106" y="10" text="Player 2" fontSize="20"/>
		<mx:Label x="85" y="49" text="{time2}" fontSize="20" textAlign="center" width="130" height="50"/>
	</mx:Canvas>
	<mx:Text x="380" y="336" text="Made and designed by Matthew McNally in ActionScript 3.0" width="330"/>
</mx:Application>

Live demo: http://checkgamertag.com/chess/