Cords of Sin.
A red wooden bead is shown with two cords running through the center. One cord is tied around the red bead, trapping it on the cord.
A green bead is threaded on one side of the red bead. On the other side, a yellow bead is threaded on.
The magician gives the cords a quick tug, and the red bead penetrates the cords and falls to the table, leaving the green and yellow bead together on the cord.