How to make a object rotate slowly on its y axis?

I would recommend using C# as javascript has been removed from unity in the new update. This code should work

  using UnityEngine;
     
     public class ExampleClass : MonoBehaviour
     {
         void Update()
         {
             // Rotate the object around its local y axis at 1 degree per second
             transform.Rotate(Vector3.up* Time.deltaTime);
         }
     }

 [SerializeField] float _degreesPerSecond = 30f;
 [SerializeField] Vector3 _axis = Vector3.forward;
 void Update ()
 {
     transform.Rotate( _axis.normalized * _degreesPerSecond * Time.deltaTime );
 }

I was trying to rotate a sprite to circle around it's own so i used like this. It's attached to object.