Level stars on levels menu

 using System;
 using System.Collections;
 using System.Collections.Generic;
 
 // Script that contains data of levels
 public class Levels : Monobehaviour {
     
     public int[] levelStatus = new int[10]; // Total 10 levels (or use inspector)
     /** Let's pretend that 
     * if levelStatus[0] == -1 { level is closed }
     * if levelStatus[0] == 0 { level is not passed or opened  }
     * if levelStatus[0] == 1 { level is passed on 1 star }
     * if levelStatus[0] == 2 { level is passed on 2 stars }
     * if levelStatus[0] == 3 { level is passed on 3 stars }
     */
     
     public void LevelOpen(int id) {
         levelStatus[id] = 0;
         
         Save();
     }
     
     public void LevelPassed(int id, int stars) {
         levelStats[id] = stars;
         
         Save();
     }
     
     private void Save() {
      // Save   
     }
     
     private void Load() {
         
     }
 }
 
 // Script that contains data of current level
 public class Levels : Monobehaviour {
     
     int id = 0; // Level first
     float time = 5;
     
     Levels levels;
     
     private Update() {
         time -= Time.deltaTime;
     }
     
     // When you win
     public void LevelPassed() {
         if(time > 4) {
             levels.levelStatus[id] = 3; // 3 stars
         } else
         if(time > 3) {
             levels.levelStatus[id] = 2; // 2 stars
         } else
         if(time > 1) {
             levels.levelStatus[id] = 1; // 1 stars
         } else
         if(time > 0) {
             levels.levelStatus[id] = 0; // 0 stars
         }
         
     }
     
 }