That schematic shows quite a bit of effort.
It looks to be master/slave flip flops, but it's not quite there, I don't think.
The set of one flip flop feeding the reset of the previous flip flop makes it seem like you were aiming for a "traveling bit" divide-by-four counter.
The cascaded ANDs makes it seem like you were aiming for a binary divide-by-sixteen counter.
I tried that web editor on a cell phone, that would drive me insane.
You can make master/slave flip flops out of NORs and ANDs.
Still, with NANDs being the cultural favorite, using just NANDs seems more recognizable to most people.
Here's a toggle flip flop using NANDs.