Toggle color of movieClip with a button

[calmchess]

//create class level or variable outside click function called toggle0:int=0;
btn0.addEventListener(MouseEvent.CLICK,btnClick,false,0,true);
fuinction btnClick(e:MouseEvent):void{
if(toggle0==0){
toggle0=1;
//code to change to blue
}else{
//code to change back to orgianol color
toggle0=0;
}
}