You could make it that way too, but it is slower. And it grows in complexity very fast if you have multiple layers. That is because expressions don’t have memory. So the last circle will send you to the 3rd, calculate its expression which then sends you to the 2nd, calculate that etc.
With all of them linked to a single slider, each expression calculates only once. So i guess the best way is to calculate the difference and repeatedly apply it to your layers.
For example, instead of “25, 50, 75” write “25 * index” if your layers start at one. Or substract the necesarry amount if they don’t start at one (ex: “25*(index -x)”
Andrei
My Envato portfolio.