WildRoot/Assets/Script/GameStep.cs

using UnityEngine;

public class NewMonoBehaviourScript : MonoBehaviour
{
    public Rotator rotator;

    private GameManager gameManager;
    private int currentStep = 0;

    private int lastMaxCount = 2;
    private int lastStep = -1;

    void Start()
    {
        gameManager = FindFirstObjectByType<GameManager>();

        gameManager.UpdateMaxSpawnerCount(2);

        UpdateStep(0);
    }

    void Update()
    {
        if (gameManager == null) return;

        float currentTime = gameManager.GetSurviveTime();

        int targetMax = 2;

        if (currentTime > 10f)
        {
            targetMax = 2 + Mathf.FloorToInt((currentTime - 10f) / 4f);
        }

        if(targetMax != lastMaxCount)
        {
            lastMaxCount = targetMax;
            gameManager.UpdateMaxSpawnerCount(targetMax);
        }

        int currentStep = (int)currentTime / 10;
        if (currentStep != lastStep)
        {
            lastStep = currentStep;
            UpdateStep(currentStep);
        }
    }

    void UpdateStep(int step)
    {
        switch (step)
        {
            case 0:
            case 1:
                if (rotator != null) rotator.enabled = false;
                break;

            case 2:
                if (rotator != null) rotator.enabled = false; 
                break;

            case 3:
            case 4:
                if (rotator != null) rotator.enabled = true;
                break;
            default: 
                if (rotator != null) rotator.enabled = true;
                break;
        }
    }
}