Traffic Light Cards

Two clear plastic sleeves are seen to be holding black cards. One card is blank on both sides, and the other has three colored spots. The cards are taken from the sleeves and put face down on the spectator's hand. When the cards are turned over one spot has magically jumped to the blank card.

Note: This is not the cheap version of this trick made by magic makers but the model made by Vincenzo Difatta of Italy.