3D Printing Endless Surface Calligraphy Pen

Hey all,

I've been using GH for a bit now but I ran into an object that I just cant decipher the logic of. I'm trying to use a similar language to the picture I posted, trying to create an endless 3D loop (not just the exoskeleton) that wraps itself around a cylindrical object but doesn't go out of the boundaries set by the cylinder. I've tried to use Voronoi 3D to create the basic outline but that's where I'm getting stuck. I've tried a few different things but to no avail. 

For some reason, I also had issues with Boolean Intersections and Box Morphing when I tried to scale or trim the pattern I have to the required shape.

Any help would be greatly appreciated.

PS: I've been using GH for a bit now but am not very big on scripting, could that be the big issue here? Is this even possible to do on GH without scripting?