how do i obtain this vector from distance shader?

so basically i've set up this distance shader that works by getting the distance from an object (this sphere) and making that into a vector attribute that can be used and visualized in the shader editor. what i want to do is get the vectors generated by the geo nodes of the border between the 0 value and the 1 value (paired down to just two values by normalize node, at least i THINK that's how that works) to generate points along just the border to turn into curves. i'm sure this is possible, i just don't know how. any help is greatly appreciated, thanks yall