Swinging Object

@midsideslimshady , i know this is an old post and all but I kinda ran into a similar problem`using a 3d project but this is how I worked around it

UnityEngine;

public class Penduling : MonoBehaviour {

 public float delta = 1.5f;  // Amount to move left and right from the start point
 public float speed = 2.0f;
 public float direction = 1;

 private Quaternion startPos;

 void Start()
 {
     startPos = transform.rotation;
 }

 void Update()
 {
     Quaternion a = startPos;
     a.x += direction * (delta * Mathf.Sin(Time.time * speed));
     transform.rotation = a;
 }

} `

Hey, thanks my dude/dudet :D