Breakpoint with two lines?

[novasnoa]

On the main page of liine there is a picture wit a breakpoint with seems to have two different independent lines you can edit.

http://liine.net/en/products/lemur/

I want to have a kind of envelope with a random function, each point can have another point above or below and the actual value is randomly in between.

How can i do this?
Best way would be to make the background of two breakpoints transparent, lay them on top of each other and choose with a switch which one to edit.

LG

Noa

[nick_liine]

That is simply motion blur from the picture.

[novasnoa]

argh, so no way to have two envelopes in one frame?