Update

Assets/Invector-3rdPersonController/Basic Locomotion/Scripts/Generic/Interactables/vPendulum.cs

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+using UnityEngine;
+using System.Collections;
+namespace Invector
+{
+    public class vPendulum : MonoBehaviour
+    {
+        [Range(0.0f, 360.0f)]
+        public float angle = 90.0f;
+        [Range(0.0f, 4.0f)]
+        public float speed = 1.5f;
+        public float startDelay;
+        Quaternion qStart, qEnd;
+        private float startTime;
+        private bool work;
+        private bool working;
+        IEnumerator Start()
+        {
+            qStart = PendulumRotation(angle);
+            qEnd = PendulumRotation(-angle);
+            yield return new WaitForSeconds(startDelay);
+            work = true;
+            //		while (true)
+            //		{
+            //			yield return new WaitForEndOfFrame();
+            //			startTime += Time.deltaTime;
+            //			transform.rotation = Quaternion.Lerp (qStart, qEnd,(Mathf.Sin(startTime * speed + Mathf.PI/2) + 1.0f)/ 2.0f);
+            //		}
+        }
+
+        void FixedUpdate()
+        {
+            if (work)
+            {
+
+                if (!working)
+                {
+                    transform.rotation = Quaternion.RotateTowards(transform.rotation, qEnd, speed);
+                    if (Vector3.Distance(transform.rotation.eulerAngles, qEnd.eulerAngles) < 0.1f)
+                    {
+
+                        working = true;
+                    }
+                }
+                else
+                {
+                    startTime += Time.deltaTime;
+                    transform.rotation = Quaternion.Lerp(qStart, qEnd, (Mathf.Sin(startTime * speed + Mathf.PI / 2) + 1.0f) / 2.0f);
+                }
+
+            }
+
+        }
+
+        void resetTimer()
+        {
+            startTime = 0.0f;
+        }
+
+        Quaternion PendulumRotation(float _angle)
+        {
+            var rot = transform.rotation;
+            var zAngle = rot.eulerAngles.z + _angle;
+
+            if (zAngle > 180) zAngle -= 360;
+            else if (zAngle < -180) zAngle += 360;
+
+            rot.eulerAngles = new Vector3(rot.eulerAngles.x, rot.eulerAngles.y, zAngle);
+            return rot;
+        }
+    }
+}