private IEnumerator ScanRotateRange(float range)
    {
        var rotationSpeed = 100f;
        var initialRotation = transform.rotation;
        var rightRotation = transform.rotation*Quaternion.AngleAxis(range/2, Vector3.up);
        var leftRotation = transform.rotation*Quaternion.AngleAxis(-range/2, Vector3.up);

        while (transform.rotation != rightRotation)
        {
            transform.rotation = Quaternion.RotateTowards(transform.rotation, rightRotation,
                rotationSpeed * Time.deltaTime);
            yield return null;
        }
        while (transform.rotation != leftRotation)
        {
            transform.rotation = Quaternion.RotateTowards(transform.rotation, leftRotation,
                rotationSpeed * Time.deltaTime);
            yield return null;
        }
        while (transform.rotation != initialRotation)
        {
            transform.rotation = Quaternion.RotateTowards(transform.rotation, initialRotation,
                rotationSpeed * Time.deltaTime);
            yield return null;
        }
    }