simple function to go “back” up the DOM (parents), or “down” (children). Pass a negative value of parents, a positive value for children… Passing 0 returns self. Will “max out” when reaching an element with no parents (if walking up) or no children (if walking down), and return the last element that did not fail (so if you have an element with 2 levels of children and pass .walk(99999) it’ll return the deepest child).