Make a tween access each element of a group with a delay between each

[scottywalker92]

I have a group of 6 elements and want them to do a specific tween separately with a delay between each.

However, everything I've tries just seems to start them all together at once. 

          var bulge = game.add.tween(tiles.getAt(i).scale).to({ x: 1.2, y: 1.2 }, 1000, Phaser.Easing.Back.InOut,false, 0, 1, true);

Any help is appreciated