Offset multiple curves with 'offset' feature set

Ability to offset more than one curve at a time; with the features (such as both sides and closed curve output) that is seen with offset.

Video explanation

HI J,
For this, you would need to dive into learning a little bit of grasshopper. In grasshopper you can offset as many curves as you want, even at different distances by grafting.
Enjoy!
!M