Four firmly riveted cards are presented. Spread them into fan and point out their sequence: black, red, black, red. Sequence on the reversed side is following: red, blue, red, blue. The riveting does not allow mix the cards in order to change their sequence. Impossible? It is sufficient to divide the cards in two and two, turn around the rivet in order to change the sequence as follows: black, black, red, red and from reverse side: red, red, blue, blue. Cards are divided into two and two again. After turning them around the rivet are set in original sequence. This effect works automatically. If spectator gets the cards in his hand he is not able to change the cards´ sequence. Trick can be repeated immediately.