16 blocks making up circular patterns

Here's another that I must have gotten years ago, and I've lost the instructions.  The sticker on the only remaining part of the packaging says "Attempt to arrange the tiles so that different colours never touch!". That seems too easy - here are two solutions that only took about ten minutes to find.

all the circles the same colour scheme, but no two colours touch anywhere

all of the tiles connected in a single loop, again no colours touching anywhere