1) I create 4 sequences

t1 = new Sequence();
t2 = new Sequence();
t3 = new Sequence();
t4 = new Sequence();

2) I add Tweens to these sequences for each square

for(var i = 1; i < 4; i++){
	var elem = document.getElementById('sq' + i);
	t1.addChild(new OpacityTween(elem,Tween.bounceEaseOut,100,0,1));
	t2.addChild(new ColorTween(elem.style,'backgroundColor',Tween.bounceEaseOut,'FF0000','00FF00',1));
	t3.addChild(new Tween(elem.style,'width',Tween.bounceEaseOut,25,100,0.5,'px'));
}

3)
I add the first 3 sequences to the 4th (sequence of sequences)

t4.addChild(t3);
t4.addChild(t2);
t4.addChild(t1);

Sequence t1 : opacity

Sequence t2 : color

Sequence t3 : size

Sequence t4 : Sequence t3 + Sequence t2 + Sequence t1