Would these sketch example links below be the kinda circular arrays you’re asking about?
http://Studio.ProcessingTogether.com/sp/pad/export/ro.90vdKMfkiO$zf
- http://Studio.ProcessingTogether.com/sp/pad/export/ro.9ldYvJUyiXGzi
- http://Studio.ProcessingTogether.com/sp/pad/export/ro.9GTDpA6dp4tH1