Call to the Colors
Call to the Colors is a classic plot in card magic in which the magician is able to deal any color he chooses. From a shuffled deck, the magician deals out the cards into red-black order, then red-red-black-black, then red-red-red-black-black-black, finally in any combination called by the spectator.
In "Card Magic for Amateurs and Professionals", Bill Simon says he based his routine on a principle by John Scarne used in "Scarne Card Puzzle". He also mentions that Cardini previously introduced a similar effect.