Flowers Change Colour In Full Sight

Don't you just love a magic trick that is instant and seamless? Here is a display involving feather flowers that never leave the gaze of the audience.
A stem of flowers is shown, with three red flowers adorning the bottom half and three green on the top half.With a pass of the hand, the flowers change colour to show that they now alternate - every second flower is red, every other is green. Just as smartly, the magician causes the order to revert to the original assortment, leaving the audience to ponder.