Rhapsody in Germany has put together instructions for how to do what she calls linienspiele -- or, "Line play". I love the way that name rolls off the tongue. :D I've been trying it out without much success, but I also admit I haven't carried anything through to the final line.
I decided to give it a try to the zendala template for the Diva's week 25 challenge. I'm pretty happy with the results.
This was done on bristol smooth using a black calligraphy marker, black micron pens in .005, .1, .2, and graphic 1, a red micron pen in .1, and grey copic pens in .1