This version adds customizer support. Note that you may have to rotate the customizer view a bunch of times for the pattern to display properly. (It looks like customizer does not like looking straight into a cut.)
Like the original version, some versions of Repetier Host require you to do a "fix normals" on the generated STL to allow the whole thing to print.
EDIT #1: Change the big number variable to not depend on layer height, in case someone chooses a miniscule layer height.
EDIT #2: Allow setting number of rings to 0

Essentially, you do the following:

1. Set your print bed such that it is NOT TOO CLOSE to your hot end. (You don't want your print head crashing in to the table - by experience!)
2. Set your printer to print one of the patterns with NO bed adhesion aids (e.g. no raft, no brim, no supports, no skirt).
3. Be ready to cancel the print, and start printing the pattern.
4. If the pattern does not look like circles or the filament drags when your printer is turning the corner, re-adjust and try printing the pattern again.