Unity helper MonoBehaviour to apply constant World-space rotation to a GameObject

ConstantRotation.cs

using UnityEngine;

public class ConstantRotation : MonoBehaviour
{
    public bool randomizeValues;
    public Vector3 speed = new Vector3(0f, 100f, 0f);
    public float multiplier = 1;
    public Vector2 randomMultiplierRange = new Vector2(90f, 120f);

    void Start()
    {
        if (randomizeValues)
        {
            multiplier = Random.Range(randomMultiplierRange.x, randomMultiplierRange.y);
            speed = Random.insideUnitSphere;
            transform.eulerAngles = speed * 180f;
        }
    }

    void Update()
    {
        Vector3 newRotation = (transform.right * Time.deltaTime * speed.x * multiplier) +
        (transform.up * Time.deltaTime * speed.y * multiplier) +
        (transform.forward * Time.deltaTime * speed.z * multiplier);
        transform.Rotate(newRotation, Space.World);
    }
}