[Dron1564]

var i:uint = 0;
TweenMax.to ( getElementById(a[i]) , i, { visible:true , repeat:1 , yoyo:true , repeatDelay: 1, onComplete:next  } );
funtion next():void{
    if( i >= a.length ) i = 0;
    else i++;
    TweenMax.to ( getElementById(a[i]) , i, { visible:true , repeat:1 , yoyo:true , repeatDelay: 1, onComplete:next  } );
}