How to change scale in tween?

[rhea]

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.anchor.setTo(0.5,0.5);
this.redcard.animations.add('left',[0,1,2,3,4],7,true);
this.redcard.animations.play('left');
this.redcard.name = index.toString();
game.physics.enable(this.redcard,Phaser.Physics.ARCADE);
this.redcard.body.immovable = true;
this.redcard.body.collideWorldBounds = true;

//mytweenfunction

this.redcardTween = game.add.tween(this.redcard).to({
  x: this.redcard.x + 75
},2000,'Linear',true,0,100,true);

}

 

Help please!