Script animation 2d question,Script animation 2d

Hello! I want to add the animation change system to my script, so that when the character moves it changes from idle to run. How can I do it?

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 [RequireComponent(typeof(Rigidbody2D))]
 [RequireComponent(typeof(CapsuleCollider2D))]
 
 public class MALPARIDOMUEVE : MonoBehaviour
 {
     // Move player in 2D space
     public float maxSpeed = 3.4f;
     public float jumpHeight = 6.5f;
     public float gravityScale = 1.5f;
     public Camera mainCamera;
 
     bool facingRight = true;
     float moveDirection = 0;
     bool isGrounded = false;
     Vector3 cameraPos;
     Rigidbody2D r2d;
     Collider2D mainCollider;
     // Check every collider except Player and Ignore Raycast
     LayerMask layerMask = ~(1 << 2 | 1 << 8);
     Transform t;
 
     // Use this for initialization
     void Start()
     {
         t = transform;
         r2d = GetComponent<Rigidbody2D>();
         mainCollider = GetComponent<Collider2D>();
         r2d.freezeRotation = true;
         r2d.collisionDetectionMode = CollisionDetectionMode2D.Continuous;
         r2d.gravityScale = gravityScale;
         facingRight = t.localScale.x > 0;
         gameObject.layer = 8;
 
         if(mainCamera)
             cameraPos = mainCamera.transform.position;
     }
 
     // Update is called once per frame
     void Update()
     {
         // Movement controls
         if ((Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D)) && (isGrounded || r2d.velocity.x > 0.01f))
         {
             moveDirection = Input.GetKey(KeyCode.A) ? -1 : 1;
         }
         else
         {
             if (isGrounded || r2d.velocity.magnitude < 0.01f)
             {
                 moveDirection = 0;
             }   
         }
 
         // Change facing direction
         if (moveDirection != 0)
         {
             if (moveDirection > 0 && !facingRight)
             {
                 facingRight = true;
                 t.localScale = new Vector3(Mathf.Abs(t.localScale.x), t.localScale.y, transform.localScale.z);
             }
             if (moveDirection < 0 && facingRight)
             {
                 facingRight = false;
                 t.localScale = new Vector3(-Mathf.Abs(t.localScale.x), t.localScale.y, t.localScale.z);
             }
         }
 
         // Jumping
         if (Input.GetKeyDown(KeyCode.W) && isGrounded)
         {
             r2d.velocity = new Vector2(r2d.velocity.x, jumpHeight);
         }
 
         // Camera follow
         if(mainCamera)
             mainCamera.transform.position = new Vector3(t.position.x, cameraPos.y, cameraPos.z);
     }
 
     void FixedUpdate()
     {
         Bounds colliderBounds = mainCollider.bounds;
         Vector3 groundCheckPos = colliderBounds.min + new Vector3(colliderBounds.size.x * 0.5f, 0.1f, 0);
         // Check if player is grounded
         isGrounded = Physics2D.OverlapCircle(groundCheckPos, 0.23f, layerMask);
 
         // Apply movement velocity
         r2d.velocity = new Vector2((moveDirection) * maxSpeed, r2d.velocity.y);
 
         // Simple debug
         Debug.DrawLine(groundCheckPos, groundCheckPos - new Vector3(0, 0.23f, 0), isGrounded ? Color.green : Color.red);
     }
 }

,Hello! I want to add the animation change system to my script, so that when the character moves it changes from idle to run, but I have no idea how using System.Collections; using System.Collections.Generic; using UnityEngine; [RequireComponent(typeof(Rigidbody2D))] [RequireComponent(typeof(CapsuleCollider2D))] public class MALPARIDOMUEVE : MonoBehaviour { // Move player in 2D space public float maxSpeed = 3.4f; public float jumpHeight = 6.5f; public float gravityScale = 1.5f; public Camera mainCamera; bool facingRight = true; float moveDirection = 0; bool isGrounded = false; Vector3 cameraPos; Rigidbody2D r2d; Collider2D mainCollider; // Check every collider except Player and Ignore Raycast LayerMask layerMask = ~(1 << 2 | 1 << 8); Transform t; // Use this for initialization void Start() { t = transform; r2d = GetComponent<Rigidbody2D>(); mainCollider = GetComponent<Collider2D>(); r2d.freezeRotation = true; r2d.collisionDetectionMode = CollisionDetectionMode2D.Continuous; r2d.gravityScale = gravityScale; facingRight = t.localScale.x > 0; gameObject.layer = 8; if(mainCamera) cameraPos = mainCamera.transform.position; } // Update is called once per frame void Update() { // Movement controls if ((Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D)) && (isGrounded || r2d.velocity.x > 0.01f)) { moveDirection = Input.GetKey(KeyCode.A) ? -1 : 1; } else { if (isGrounded || r2d.velocity.magnitude < 0.01f) { moveDirection = 0; } } // Change facing direction if (moveDirection != 0) { if (moveDirection > 0 && !facingRight) { facingRight = true; t.localScale = new Vector3(Mathf.Abs(t.localScale.x), t.localScale.y, transform.localScale.z); } if (moveDirection < 0 && facingRight) { facingRight = false; t.localScale = new Vector3(-Mathf.Abs(t.localScale.x), t.localScale.y, t.localScale.z); } } // Jumping if (Input.GetKeyDown(KeyCode.W) && isGrounded) { r2d.velocity = new Vector2(r2d.velocity.x, jumpHeight); } // Camera follow if(mainCamera) mainCamera.transform.position = new Vector3(t.position.x, cameraPos.y, cameraPos.z); } void FixedUpdate() { Bounds colliderBounds = mainCollider.bounds; Vector3 groundCheckPos = colliderBounds.min + new Vector3(colliderBounds.size.x * 0.5f, 0.1f, 0); // Check if player is grounded isGrounded = Physics2D.OverlapCircle(groundCheckPos, 0.23f, layerMask); // Apply movement velocity r2d.velocity = new Vector2((moveDirection) * maxSpeed, r2d.velocity.y); // Simple debug Debug.DrawLine(groundCheckPos, groundCheckPos - new Vector3(0, 0.23f, 0), isGrounded ? Color.green : Color.red); } }