duck

var targetOffsetDirection = (transform.position - target.position).normalized;
var idealPosition = target.position + targetOffsetDirection * safeDistance;
var directMoveDirection = (idealPosition - transform.position).normalized;
var perpendicularMoveDirection = new Vector3(-directMoveDirection.z, 0, directMoveDirection.x);
var zigzag = Mathf.PingPong(Time.time, 2) - 1;
var moveDirection = directMoveDirection + perpendicularMoveDirection * zigzagFactor;