edit no#4 and #5

Forgot to commit between edits.
#4 I replaced the code of spheres which I'd made with code for bezier
curves still using the noise coding from the original program to
detirmine the vertex positions. I changed the stroke colour to get a
consistent rainbow pattern through the image.
#5 I replaced the code for bezier curves with lines and added a sphere
to the end of each line. Also changed the stroke colour.