Connections
Puzzle #704
🟨🟨🟨🟨
🟩🟩🟩🟩
🟪🟪🟪🟪
🟦🟦🟦🟦
Blue was left over and spent a long time trying to see the connection. Gave up. Fair connection, but I don't think I would have got there for a while (maybe with another cup of coffee).