Test123/Assets/Scripts/SimpleBall.cs

using UnityEngine;

namespace CrimsofallTechnologies.SimpleBall {
    public class SimpleBall : MonoBehaviour
    {
        public MeshRenderer mRenderer;
        public float rotationSpeed = 10f;

        private void Start()
        {
            if(mRenderer != null)
            {
                mRenderer.material.color = Random.ColorHSV();
            }
        }

        private void Update()
        {
            transform.Rotate(Vector3.up, rotationSpeed * Time.deltaTime);
        }

        private void OnMouseDown()
        {
            if(mRenderer != null)
            {
                mRenderer.material.color = Random.ColorHSV();
            }
        }
    }
}