Changing scale for Tween

Im trying to add this enemy in my game which moves from right to left and plays animation. It only plays the animation going to the right but when going back how do i reverse it?

this is my code:

Enemy1 = function(index,game,x,y){

this.redcard = game.add.sprite(x,y,‘redcard’);
this.redcard.animations.add(‘left’,[0,1,2,3,4],7,true);‘left’); = index.toString();
this.redcard.body.immovable = true;
this.redcard.body.collideWorldBounds = true;


this.redcardTween = game.add.tween(this.redcard).to({
x: this.redcard.x + 75


Help please!