for anyone interested in my effect here is how it worked:
1. I stacked the top half of the deck like this, As 3h 5c 7d 9s jh kc. Keep repeating the pattern of s,h,c,d and all the odd cards until you run out. The last card in the top half will be the Kd. I put a Breather Crimp into this card.
The remaining cards I just mixed together randomly but alternated in color black,red,black,red etc.
2. She cuts the cards and the breather crimp forces the cut to separate the 2 stacks I have.
3. She cuts the top half with the odd stacked cards repeatedly and stops on one and puts it away. I just peek at the bottom card and know what card she took.
4. Now with the other half of the cards, I separate the cards into 2 halves and give it one fair riffle shuffle.
5. She gets the first guess of red or black. No matter what she says, when its my guess I just name the color opposite of the color her card actually was. If she says black, and her card is black, the next card will be red. If she says red and her card is black the next card will be red. No matter if she is right or wrong, you will always be right. Just name the color opposite of the one her card actually was. This is known as the Gilbreath Principle. It will work. I don't really know why, but I know it does.
Thats it. have fun!