Its a sure bet with these cards that change from red to blue to green

Two red cards and one blue card are displayed. the blue card is placed on the bottom of the deck where it promptly turns into a red card. Next, the top card and bottom cards are also shown to be red! the bottom card is revealed to show that it has changed to blue. Now, the top and bottom card are shown to be blue, too! the cards are counted showing only three cards. The top card is shown to be red, the middle card is shown to be blue. the spectator is asked to guess the colour of the bottom card, which is then shown to be GREEN, with the sign...

"You Owe $14!"