How to modify the shape of a mesh box with an atractor

Hi everybody!

I've been using grasshopper for a couple months but I still have some basic doubts...

My problem is that I want to get a mesh from a subdivided mesh box which could change its shape according to an atractor. It might be like a cage whose walls move to the atractor when it gets closer, while the lenght of the subdivisions doesn't change. The idea is that it looked like it was falling down or collapsing over the point where the atractor is.

I hope you can help me. Thanks!