Lighting FX Using Curves and Gradients for Unity3D

using UnityEngine;
using System.Collections;
//Light FX Script for Unity3D - using curves and a gradient your light will change over time
//  eg: Use a quick declining curve, and gradient from bright to dark for an explosion
//  eg: Make nice random curves for a torch flicker

// Quentin Preik 2013/10/22
// @fivearchers

public class LightCurve : MonoBehaviour {
    public AnimationCurve intensityCurve;   //Used for intensity over time - cover 0-1 on both axis
    public float intensityMin;              //Base intensity
    public float intensityMax;              //Max intensity - so using, 2 and 10 - at the bottom of a curve intensity
                                                //would be 2 and at the top it would be 10

    public Gradient colorCurve;             //Gradient to color the light over time
    public AnimationCurve rangeCurve;       //Curve to change the range of the light over time
    public float rangeMin;                  //Minimum range
    public float rangeMax;                  //Maximum range
    public float curveSpeed;                //How fast to go through the curves and gradient - 1=1s, 2=0.5s, 0.5=2s
    public float curvePosition;             //Where to start on the curve 0-1, 0.5 would start halfway
    public bool loop;                       //Whether to loop through the curve
    public bool dieWhenDone;                //If you're not looping should the object destroy itself when it's done
    private Light myLight;
    // Use this for initialization
    void Start () {
        myLight=gameObject.light;
    }

    // Update is called once per frame
    void Update () {
        if (curvePosition!=1f||!loop){
            curvePosition+=curveSpeed*Time.deltaTime;
            if (curvePosition>1f){
                if (dieWhenDone){
                    Destroy(gameObject);
                    return;
                }
                if (!loop){
                    curvePosition=1f;
                }
                else {
                    curvePosition=1f-curvePosition;
                }
            }
            light.intensity=intensityMin+(intensityMax-intensityMin)*intensityCurve.Evaluate(curvePosition);
            light.color=colorCurve.Evaluate(curvePosition);
            light.range=rangeMin+(rangeMax-rangeMin)*rangeCurve.Evaluate(curvePosition);
        }
    }
}