Unity how to create animation on touch?

Question

Unity

I want that when I touch my character, the animation will play
and then the original animation will return. (which was before the touch)
in my case, click 1 is the initial animation of the character (when I do nothing)
and click 2 is the animation when the mouse is clicked or touched.
I need the
original click 1 animation to return after the click 2 animation.
When I click or touch, the click 2 animation is played and weighs on this click 2 infinitely.
For example, in the Talking Tom application,
when we touch Tom's head or stomach,
a hit animation is played,
and after that Tom returns to its original state.
And when I touch the character once
, this is the hit animation
reproduced endlessly

tried such a script. Created an int variable in the animator

public class toches : MonoBehaviour
{
Animator animtoches;

private void OnMouseDown()
{
if(Input.touchCount == 0)
{
animtoches.SetInteger("click", 1);
}
else if (Input.touchCount >0)
{
animtoches.SetInteger("click",2);
}

void Start()
{
animtoches = GetComponent Animator();
}

I tried to write the same script in void upade.
but the desired result was not achieved

who can help with the script.