first attempt at mathematical curve stitching

i was given a great book of mathematical curve stitching, written by a maths person in like, the 70's or something. it's ace! my first go went fairly well:

it's based on a cube...the thing is, in the book, all the stitching is done on paper, where you do all the accurate measuring on the back of your work and mark where all your holes are meant to be so that it's perfect on the front. it was a bit more tricky than that on the fabric, for one i couldn't get the most clean lines when drawing on the back, the ruler being much longer than the embroidery hoop is wide was a bit problematic, and the weave of the fabric didn't quite lend itself to the project. all that aside, i thought it went quite well and looks a bit odd and striking, shall have to patch it onto something, a little clutch bag or something : )