How do i make a crouching function for my fps controller?

Unity Engine
1

I’m trying to make a first person controller and I’m not quite sure how to go about making the crouching, all I need is for the camera to be lowered and raised smoothly. I put the whole script for reference if needed.

{

    public CharacterController charCon;

    public float speed = 10f;
    public Camera cam;

    private bool isCrouching;

    [Header("Running")]
    public float stamina = 100f;
    public float potentialConsumption;
    private bool isRunning;

    [Header("Jump Related")]
    public float gravity = -5f;
    public float groundDistance = 0.25f;
    public float jumpHeight = 5f;
    Vector3 velocity;
    bool isGrounded;
    public Transform groundCheck;
    public LayerMask groundMask;

    void Update()
    {
        StanceCheck();

        isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);

        if (isGrounded && velocity.y < 0)
        {
            velocity.y = -2f;
        }

        float x = Input.GetAxisRaw("Horizontal");
        float z = Input.GetAxisRaw("Vertical");

        Vector3 move = transform.right * x + transform.forward * z;

        charCon.Move(move.normalized * speed * Time.deltaTime);

        if (Input.GetButtonDown("Jump"))
        {
            velocity.y = Mathf.Sqrt(jumpHeight * -2 * gravity);
        }

        velocity.y += gravity * Time.deltaTime;

        charCon.Move(velocity * Time.deltaTime);

        if(stamina > 100f)
        {
            stamina = 100f;
        }
        if(stamina < 0f)
        {
            stamina = 0f;
        }

        if (isRunning)
        {
            stamina -= 0.1f;
        }
        else
        {
            stamina += 0.1f;
        }
    }

    void StanceCheck()
    {
        if (Input.GetKey(KeyCode.LeftShift) && stamina > 0f)
        {
            speed = 15f;

            isRunning = true;

            if (cam.fieldOfView < 66)
            {
                cam.fieldOfView += (5 * Time.deltaTime * 5);
            }
        }
        else if (!isCrouching)
        {
            speed = 10f;
            isRunning = false;

            if (cam.fieldOfView > 59)
            {
                cam.fieldOfView += (-5 * Time.deltaTime * 5);
            }
        }
        else if (isCrouching && !isRunning)
        {
            // do crouch things
            speed = 5f;
        }

        if (Input.GetKey(KeyCode.LeftControl))
        {
            isCrouching = true;
        }
        else
        {
            isCrouching = false;
        }
    }
}
2

i forgot to mention, its in the StanceCheck function

3

Here’s a simple tutorial for crouching with a CharacterController: