Changing a variable of function from another script - unity3d

Question

Hello everyone I have a question. I have 2 script files on Unity.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Rendering.Universal;
public class CycleFinal : MonoBehaviour
{
//Lights
public Light2D GlobLight;
public Light2D SptLight;
//Displays
public Text timeDisplay;
public Text moveDisplay;
public Text phaseDisplay;
//Others
[SerializeField]
public float cdTimer = 20f;
public float moveCount = 20f;
void Start()
{
timeDisplay.GetComponent<Text>();
moveDisplay.GetComponent<Text>();
phaseDisplay.GetComponent<Text>();
moveCount = 0f;
DayTime();
}
void Update()
{
cdTimer -= Time.deltaTime;
if(cdTimer <0){
NightTime();
}else if(moveCount <0){
DayTime();
}
timeDisplay.text = "Day Time left: " + Mathf.Round(cdTimer);
moveDisplay.text = "Movement left: " + Mathf.Round(moveCount);
}
public void DayTime(){
phaseDisplay.text = "Day";
SptLight.intensity = 0;
GlobLight.intensity = 1;
moveCount = 0;
}
public void NightTime(){
phaseDisplay.text = "Night";
SptLight.intensity = 1;
GlobLight.intensity = 0;
moveCount = 20;
cdTimer = 0;
}
}
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Tilemaps;
public class PlayerController : MonoBehaviour
{
public CycleFinal script;
private PlayerMovement controls;
[SerializeField]
private Tilemap groundTilemap;
[SerializeField]
private Tilemap collisionTilemap;
private void Awake() {
controls = new PlayerMovement();
}
private void OnEnable() {
controls.Enable();
}
private void OnDisable() {
controls.Disable();
}
void Start()
{
controls.Main.Movement.performed += ctx => Move(ctx.ReadValue<Vector2>());
}
private void Move(Vector2 direction){
if(CanMove(direction))
transform.position += (Vector3)direction;
}
private bool CanMove(Vector2 direction){
Vector3Int gridPosition = groundTilemap.WorldToCell(transform.position + (Vector3)direction);
if(!groundTilemap.HasTile(gridPosition) || collisionTilemap.HasTile(gridPosition) || script.moveCount <= 0)
return false;
else
return true;
}
}
I am trying to decrease moveCount variable on every move my character made. (I'm planing to do this thing on PlayerController script Move function.) I accomplished this while moveCount variable is a variable outside of the NightTime function but when I move that moveCount variable in to the NightTime function I couldn't change its value. How can I do that?
Also main thing I want to do with those 2 script is the player will have x seconds of day time and x moves on nighttime when x seconds ends the game turns into night time and when x moves ends the game turns into day time.