StellarXipher/Assets/Scripts/CeilingLightController.cs

using UnityEngine;
using System.Collections;

public class CeilingLightController : MonoBehaviour
{
    private Light ceilingLight;
    private Coroutine fadeCoroutine;
    private bool isFading = true;
    private Color defaultColor;
    private float defaultIntensity;
    public float fadeDuration = 0.5f;

    void Start()
    {
        ceilingLight = GetComponent<Light>();
        defaultColor = ceilingLight.color;
        defaultIntensity = ceilingLight.intensity;
        ceilingLight.color = Color.red;
        ceilingLight.intensity = 0;
        fadeCoroutine = StartCoroutine(FadeInOut());
    }

    IEnumerator FadeInOut()
    {
        while (isFading)
        {
            float timer = 0f;
            while (timer < fadeDuration)
            {
                timer += Time.deltaTime;
                float t = timer / fadeDuration;
                ceilingLight.intensity = Mathf.Lerp(0, defaultIntensity, t);
                yield return null;
            }

            ceilingLight.intensity = defaultIntensity;
            timer = 0f;

            while (timer < fadeDuration)
            {
                timer += Time.deltaTime;
                float t = timer / fadeDuration;
                ceilingLight.intensity = Mathf.Lerp(defaultIntensity, 0, t);
                yield return null;
            }
            ceilingLight.intensity = 0;
        }
    }

    public void StopFading()
    {
        if (fadeCoroutine != null)
        {
            StopCoroutine(fadeCoroutine);
            fadeCoroutine = null;
        }
        isFading = false;
        ceilingLight.color = defaultColor;
        ceilingLight.intensity = defaultIntensity;
    }
}