Guys i want to add wallrunning in my game if you think you can help out here is my script

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

public class tebrawtf : MonoBehaviour { public CharacterController controller;

 public float walkSpeed = 15f;
 public float runSpeed = 23f;
 public float gravity = -19.62f;
 public float jumpHeight = 3f;

 public Transform groundCheck;
 public float groundDistance = 0.4f;
 public LayerMask groundMask;
 float speed;
 Vector3 velocity;
 bool isGrounded;
 bool midAirJump;
 float runTimer;
 // Update is called once per frame
 void Update()
 {
     isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);
     if (isGrounded && velocity.y < 0)
     {
         velocity.y = -2f;
     }
     float x = Input.GetAxis("Horizontal");
     float z = Input.GetAxis("Vertical");

     if (z > 0)
     {
         runTimer += Time.deltaTime;
         if (runTimer > 4)
             speed = runSpeed;
     }
     else
     {
         speed = walkSpeed;
         runTimer = 0;
     }

     Vector3 move = transform.right * x * walkSpeed + transform.forward * z * speed;
     controller.Move(move * Time.deltaTime);
     if (Input.GetButtonDown("Jump"))
     {
         if (isGrounded)
         {
             velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);    //your jumping code
             midAirJump = true;
         }
         else if (midAirJump)
         {
             velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);    //your jumping code
             midAirJump = false;
         }
     }
     velocity.y += gravity * Time.deltaTime;
     controller.Move(velocity * Time.deltaTime);
 }

}