Punching objects (C#)

Contrary to the title I mean taking an object, such as a cube or fist model, and say when you hit mouse button 1 the fist or cube “punches.” I have been trying to figure this out for several hours and I know it should be pretty simple but I don’t know what to do. Help is much appreciated, thanks!

Here is a simple punching script. Note if you want the punch to interact with Rigidbodies, it would be best to rewrite the manipulation of the transform to use Rigidbody.MovePosition().

#pragma strict

var punching = false;

function Update() {
	if (!punching && Input.GetKeyDown(KeyCode.Space)) {
		Punch(0.5, 1.25, transform.forward);

function Punch(time : float, distance : float, direction : Vector3 ) {
	punching = true;
	var timer = 0.0;
	var orgPos = transform.position;
	while (timer <= time) {
		transform.position = orgPos + (Mathf.Sin(timer / time * Mathf.PI) + 1.0) * direction;
		timer += Time.deltaTime;
	transform.position = orgPos;
	punching = false;