Move Object In Square Shape Formula

MoveInSquareShape.cs

using UnityEngine;

public class MoveInSquareShape: MonoBehaviour
{
    public float size = 1f;
    public float rotation = 0f;
    
    private void Update()
    {
        transform.localPosition = Quaternion.Euler(0, 0, rotation) *
                    Vector3.up * size / Mathf.Cos(Mathf.PingPong(rotation, 45f) * Mathf.Deg2Rad) / 2f;
    }
}