How do I make an animation stop when button is no longer pressed? 2D C#,How do I stop animating when Key isn't pressed 2D

I haven't found the answer anywhere so far. Everything in my game works except this. At the moment I simply want my player to play an animation where he looks down then when you release the button, he stops that animation and goes back to idle. I don't know why it's so hard for me to make something so simple LOLOLOL XD I know it's not my animator that's the problem because right now I have it set as (Requires LookDown to be true) to enter the animation and (Requires LookDown to be false) to exit the animation back to Idle. LookDown is set as a bool. Thanks everyone.

Below is my script

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityStandardAssets.CrossPlatformInput;

public class Player : MonoBehaviour { // Config [SerializeField] float runSpeed = 5f; [SerializeField] float jumpSpeed = 5f; [SerializeField] float climbSpeed = 5f; [SerializeField] new Vector2 deathKick = new Vector2(5f, 5f);

 // State
 bool isAlive = true;

 // Cached Component reference
 Rigidbody2D myRigidBody;
 Animator myAnimator;
 CapsuleCollider2D myBodyCollider2D;
 BoxCollider2D myFeet;
 float gravityScaleAtStart;


 // Message then methods
 void Start()
 {
     myRigidBody = GetComponent<Rigidbody2D>();
     myAnimator = GetComponent<Animator>();
     myBodyCollider2D = GetComponent<CapsuleCollider2D>();
     myFeet = GetComponent<BoxCollider2D>();
     gravityScaleAtStart = myRigidBody.gravityScale;
 }

 // Update is called once per frame
 void Update()
 {
     if (!isAlive) { return; }
     LookDown();
     Run();
     ClimbLadder();
     Jump();
     FlipSprite();
     Die();
     
 }

 private void LookDown()
 {
     if (Input.GetKeyDown("down"))
     {
         myAnimator.SetBool("LookDown", true);
     }
     if (Input.GetKeyDown("down") == false)
         {
             myAnimator.SetBool("LookDown", false);
         }



 }

 private void Run()
 {
     float controlThrow = CrossPlatformInputManager.GetAxis("Horizontal"); // value is betweeen -1 to +1
     Vector2 playerVelocity = new Vector2(controlThrow * runSpeed, myRigidBody.velocity.y);
     myRigidBody.velocity = playerVelocity;

     bool playerHasHorizontalSpeed = Mathf.Abs(myRigidBody.velocity.x) > Mathf.Epsilon;
     myAnimator.SetBool("Running", playerHasHorizontalSpeed);
     

 }

 private void ClimbLadder()
 {
     if (!myFeet.IsTouchingLayers(LayerMask.GetMask("Climbing")))
     {
         myAnimator.SetBool("Climbing", false);
         myRigidBody.gravityScale = gravityScaleAtStart;
         return;
     }

     float controlThrow = CrossPlatformInputManager.GetAxis("Vertical");
     Vector2 climbVelocity = new Vector2(myRigidBody.velocity.x, controlThrow * climbSpeed);
     myRigidBody.velocity = climbVelocity;
     myRigidBody.gravityScale = 0f;

     bool playerHasVerticalSpeed = Mathf.Abs(myRigidBody.velocity.y) > Mathf.Epsilon;
     myAnimator.SetBool("Climbing", playerHasVerticalSpeed);
 }

 private void Jump()
 {
     if (!myFeet.IsTouchingLayers(LayerMask.GetMask("Ground")))
     {
         return;
     }



     if (CrossPlatformInputManager.GetButtonDown("Jump"))
     {

         Vector2 jumpVelocityToAdd = new Vector2(0f, jumpSpeed);
         myRigidBody.velocity += jumpVelocityToAdd;
         myAnimator.SetBool("Jumping", true);
         
     }
     else
     {
         myAnimator.SetBool("Jumping", false);
     }
 }

 private void Die()
 {
     if (myBodyCollider2D.IsTouchingLayers(LayerMask.GetMask("Enemy")))
     {
         isAlive = false;
         myAnimator.SetTrigger("Dying");
         GetComponent<Rigidbody2D>().velocity = deathKick;
         
     }
 }

   
 private void FlipSprite()
 {
     bool playerHasHorizontalSpeed = Mathf.Abs(myRigidBody.velocity.x) > Mathf.Epsilon;
     if (playerHasHorizontalSpeed)
     {
         transform.localScale = new Vector3(Mathf.Abs(transform.localScale.x) * Mathf.Sign(myRigidBody.velocity.x), transform.localScale.y);
     }
 }

}