Fire Animation Unity

using UnityEngine;
using System.Collections;

public class FireAnimation : MonoBehaviour
{
    private Vector3 originalPosition;
    public Light light;
    public float baseLight = 0.5f;
    public float randLight = 1f;
    public float size = 0.15f;
    public float speed = 20f;

	void Start ()
    {
        originalPosition = gameObject.transform.position;

    }
	
	void Update ()
    {
        light.intensity = baseLight + Random.value * randLight;
        gameObject.transform.position = originalPosition + new Vector3(Mathf.Cos(Time.timeSinceLevelLoad * speed), Mathf.Sin(Time.timeSinceLevelLoad * (speed * 1.1f) + 1f), Mathf.Cos(Time.timeSinceLevelLoad * (speed * 1.2f) + 2f)) * size;
    }
}