Say "RED!" Simulation

This is a card game. The game needs two partners and an ordinary deck of cards, the first partner (A) has to turn over the cards one at a time, while the second (B) watches and chooses a time to say RED at which point the card that is on the top of the deck is turned over. The player B wins if it is red. If not, player B loses. Player B must say RED some time before all the cards are revealed. What if you pick a random number between 1 and 52. That number is the card on which you will say “RED!”  How likely are you to win under this strategy?