Player Animation

//Player Animation
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerAnimation : MonoBehaviour
{
    private Animator animator;
    private CharacterController _controller;
    private bool _isGrounded;
    public void Start()
    {
        _controller = GetComponent<CharacterController>();
        animator = GetComponent<Animator>();
    }

    public void Update()
    {
        _isGrounded = _controller.isGrounded;
        bool isWalking = animator.GetBool("isWalking");
        bool isRunning = animator.GetBool("isRunning");

        bool leftPressed = Input.GetKey(KeyCode.A);
        bool rightPressed = Input.GetKey(KeyCode.D);
        bool runPressed = Input.GetKey(KeyCode.X);
        bool jumpPressed = Input.GetKeyDown(KeyCode.Space);


        OnStateEnter(); // TODO: check and make it better

        if ((leftPressed || rightPressed) && !isWalking)
        {
            animator.SetBool("isWalking", true);
        }

        if (!(leftPressed || rightPressed) && isWalking)
        {
            animator.SetBool("isWalking", false);
        }

        if (((leftPressed || rightPressed) && runPressed) && !isRunning)
        {
            animator.SetBool("isRunning", true);
        }

        if ((!(leftPressed || rightPressed) || !runPressed) && isRunning)
        {
            animator.SetBool("isRunning", false);
        }

        if (jumpPressed && _isGrounded)
        {
            animator.SetTrigger("Jumping");
        }
    }

    private void OnStateEnter()
    {
        animator.ResetTrigger("Jumping");
    }
}