holopy3/Assets/Scripts/TurnAround.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TurnAround : MonoBehaviour
{
    private bool turn = true;
    private void OnEnable()
    {
        PassTheEdgeTrigger.OnPassingTheEdge += StopTurning;
    }

    private void OnDisable()
    {
        PassTheEdgeTrigger.OnPassingTheEdge -= StopTurning;
    }

    public float Speed = 3.0f;


    void Update()
    {
        if (turn)
        {
            gameObject.transform.Rotate(Vector3.up / Speed);
        }

    }

    private void StopTurning()
    {
        turn = false;
    }
}