Unity3D Bloom Animation

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.PostProcessing;

public class BloomTrigger : MonoBehaviour
{
    public float Duration;
    public Vector2 IntensityRamp;
    public Vector2 ThresholdRamp;
    public Vector2 RadiusRamp;

    private bool _enabled;
    private float _intensity, _threshold, _radius;
    private bool _isRunning = false;

    public void Activate()
    {
        StartCoroutine(Activate_Async());
    }

    private IEnumerator Activate_Async()
    {
        _isRunning = true;

        BloomModel bloom = GameState.Player.PostProcessing.bloom;
        BloomModel.Settings settings = bloom.settings;

        // Save these values before modifying them, so we can revert them when we are done.
        _intensity = settings.bloom.intensity;
        _threshold = settings.bloom.threshold;
        _radius = settings.bloom.radius;
        _enabled = bloom.enabled;

        bloom.enabled = true;
        float timer = 0;
        while(timer < Duration)
        {
            timer += Time.deltaTime;
            settings.bloom.intensity = Mathf.Lerp(IntensityRamp.x, IntensityRamp.y, timer / Duration);
            settings.bloom.threshold = Mathf.Lerp(ThresholdRamp.x, ThresholdRamp.y, timer / Duration);
            settings.bloom.radius = Mathf.Lerp(RadiusRamp.x, RadiusRamp.y, timer / Duration);
            bloom.settings = settings;
            yield return null;
        }

        ResetValues();

        _isRunning = false;
    }

    private void OnDestroy()
    {
        if (_isRunning)
        {
            ResetValues();
        }
    }

    private void ResetValues()
    {
        BloomModel bloom = GameState.Player.PostProcessing.bloom;
        BloomModel.Settings settings = bloom.settings;

        bloom.enabled = _enabled;
        settings.bloom.intensity = _intensity;
        settings.bloom.threshold = _threshold;
        settings.bloom.radius = _radius;

        bloom.settings = settings;
    }
}