Making Character Slidesideways then back on Buttonclick

Im using JavaScript, and ive got my code fine when you click Attack it hurts the monster depending on your status but I wish to know how I can make the picture of the character slide right on the screen then back a little bit when attack is clicked. its just a stickman so I don't need the animation moving just to slide left to right. Would anyone be able to point me in the right direction

Please and Thankyou In Advance.

 

transform.position seems to be the way to go, but maybe you could provide a screenshot showing what you mean by "picture of the character"?