How to make the black aces exchange with the red ones, and then collect them together in the middle of the pack

Choose 4 Aces from the deck and put them on the table. Take 2 aces of reds and place them defiantly in the middle of the deck, which you hold in your left hand in the open position as if you opened the book. An invisible movement for the audience, put the little finger between the aces. Then put the remaining aces down and up, while paying attention to the audience of the aces suit. Next, put one of the black aces up, slightly open your left hand and turn the deck up, move the lower ace to the front side of the deck. Then again, return the deck to its initial position and simultaneously with this move make a reception of the volts . Thus, half of the deck exchanged places and aces also changed places. Aces with black suits are in the middle of the deck, and aces with red suits are on the bottom and on top. Immediately viewers can not be shown, so ask the audience where the aces are. If any viewer has forgotten this and asks you to show them, then in this case, after the volt, you should not connect both halves of the deck, but should separate them with a little finger. Now you will be rescued from a difficult situation by repeated volts. Do it, and you will return the cards to their starting position and show the audience the aces. After that, say that now you will order the aces to swap places, then make a quick movement with your right hand forward and at that moment execute the volt, but only if you had to return the cards to the initial position before. After that, turn the cards face down to the audience and show that the cards really turned into others. Showing the aces of the black suits in the middle, you again have to separate them with the little finger and when closing the deck, which is now upside down, make a volt. Then, with an effective gesture, place the deck face down on the table.