You show four cards from the back. They all have blue backs. When you shake them, one turns up face. It is the king of diamonds. When you show the cards again, they now all have red backs. Another shake and another king turns face up. But now they all have green backs. You then display all four kings from the face. The climax is that all four kings link into one ribbon.
1st edition 2024, video 6:12.