[Help wanted] Features JcoolGraph draw two lines

[the-maux]

Hi !

First of all, awesome work 😀 and thanks for the sharing even if it's in chinese it's well coded and I learned many things ! Thanks again.
I'm curently trying to draw 2 lines on the same graph, and so far i realised that i need to add that features on the source code.

My idea was to do exactly the same process of the line creation and ré-execute it with a new feedDate. But it's break everything on the drawLine().

Maybe i'm using the wrong object, maybe i should focus on the MultiGraph objects.

Any sugestions ?