Effect:
The magician takes a packet of ten cards from the top of a shuffled deck. A spectator thinks of one of those cards and memorizes it. The magician tells the spectator to also memorize the position of the card from the top of the (face-down) packet. That done, the magician squares the packet up.

Magician divides the packet in half. He takes the top five cards and places them under the bottom five. He asks the spectator for the position of the remembered card. Magician takes a card from the top of the packet and puts it on the bottom. Do this the same number of times as the number the spectator gave you.

good trick and easy. thatnks