How can add my code both run and walk ?

Unity Engine
1

This is my player controller code and my first draft was like ““public float moveSpeed;”” like that but then i want to add runing animations to and i implemented my code "“public float runSpeed – public float runSpeed” but when i press “d” which moves my character right my player start jumping to the right and when i press “a” which moves my character left ,my character walks left

this is my animator part:

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Arrows:
player idle to player run if speed greater than 8
player run to player idle if speed less than 0.1

player idle to player walk if speed greater than 4
player walk to player idle if speed less than 0.1

player run to player walk if speed less than 7.9
player walk to player run if speed greater than 8

player idle to player jump if speed grounded false
player jump to player idle if speed grounded true
player walk to player jump if speed grounded false

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
    // this will speed up the players movement
    // public float moveSpeed;
    public float runSpeed  ;
    public float walkSpeed  ;
    //this will get the players rigidbody
    private Rigidbody2D rb;
    //this will be the jump speed of the player
    public float jumpSpeed;

    public Transform groundCheck;
    public float groundCheckRadius;
    public LayerMask whatIsGround;
    public bool isGrounded;

    private Animator anim;



    void Start()
    {
        //at the start this will get the rigidbody2d
        rb = GetComponent<Rigidbody2D>();

        anim = GetComponent<Animator>();
    }

   
    void Update()
    {


        isGrounded = Physics2D.OverlapCircle(groundCheck.position, groundCheckRadius, whatIsGround);
           //if input horizontal is greater than zero
        if (Input.GetAxisRaw("Horizontal") > 0f)
        {
            //we then getr the velocity at its movespeed
            rb.velocity = new Vector4(walkSpeed,runSpeed, rb.velocity.y, 0f);
        }
            //if input less than zero
        else if(Input.GetAxisRaw("Horizontal")< 0f)
        {
            //we then get the velocity at its -movespeed
            rb.velocity = new Vector4(-walkSpeed,-runSpeed, rb.velocity.y, 0f);
        }
        else
        {
             //if input x is 0f then the player will not slide
            rb.velocity = new Vector3(0f, rb.velocity.y, 0f);

        }
        //if we hit the jump button
        if (Input.GetButtonDown("Jump") && isGrounded)
        {
            //then we get the y axis at the give jumpspeed and the the
            rb.velocity = new Vector3(rb.velocity.x, jumpSpeed, 0f);
        }

        anim.SetFloat("Speed", Mathf.Abs(rb.velocity.x));
        anim.SetBool("Grounded", isGrounded);
    }
}

Guys I am sorry for my English

2

what you need to do is pass velocity x,z axis movement in to animator, and used blendtree to anime walk/run blending.