controlling separate nodes in a path

Hello.

I'm trying to animate a path by animating separate nodes. Basically i'm looking
for a property like pathname.node1 [x,y], or something similar, if it even
exist, or any other way to animate a node using expressions.

Scripts and expressions are two different ways of approaching automation in
After Effects. Expressions are evaluated on every frame, they can only operate
on the properties to which they have been applied, and the changes they make are
only in effect as long as the expressions are enabled. Scripts are only
evaluated when you explicitly run them; you run the script, it does its work,
and the changes it makes to the After Effects project are as permanent as if you
had made those changes manually. Scripts can access a lot of objects and
properties that expressions cannot, mask vertices being a good example, and a
single script can modify as any number of different objects or properties, since
scripts aren't tied to properties the way expressions are. They can also create
and remove objects within the project, something expressions can't do. A script
can even modify an expression, but not vice versa.