Click the green flag!
Thanks @bubble103 for the prompt at https://scratch.mit.edu/projects/276670735 I got a prompt of "Radial Symmetry" with blocks of "Current", "If _ Else", and "pick random between". I definitely failed at the 'symmetry' part as I used all of the other blocks to implement elements of randomness that removed symmetry, but at least I got the radial part in there.