Last night I was playing a game of cards with my good friend Captain Pun and his wife.
All of a sudden, partway through a round, he threw down a card that bore this design:
Colour-blind-friendly version available here.
I asked him what it meant, but he remained tight-lipped, clearly waiting for me to work out its significance for myself. After a couple of minutes I finally realised his intention, then I smiled...
Can you work out the meaning of Captain Pun's card?
Please include an explanatory diagram in your solution.