PSR B1919+21
Another item hot off the plotter. This was done entirely with the new engine too and I'm pretty happy with how easy it is to generate what I want, considering I'm describing these images the dumbest LISP interpreter imaginable.
It's the pulsar recordings made famous by the cover of Unknown Pleasures by Joy Division, 45 years ago. I've tried to reproduce the page from the book where the data were first published in 1970.
I'm not 100% happy with the plot though. I think it's time to get off the basic ballpoint pen bandwagon and try some other pens out. It's also a bit inaccurate with the line origins, particularly at the top of the image. Maybe it's the physical setup, which is a little rickety, especially the pen holder, or maybe its the pen, maybe it's the gcode... heh.