In this article, the blue and green groups are both on the same side with the bond or the other facet. Or you can make anything various. If over two ring carbons have substituents, the stereochemical notation distinguishing the various isomers gets a lot more complicated and also the prefixes https://reidgyqhx.blogolize.com/the-acat-in-1-cis-isomer-diaries-70220759