Double Color Changing Silk magic tricks

The Magician shows two Silks of two different colors (say Red and Green) tied together by their diagonal corners.

He passes his hand over the pair of Silks, and they change to two silks of entirely different colors (say Blue and Orange).

The effect can be repeated as often as you wish.

You can produce the pair of Silks from some production apparatus then magically cause the Silks to change colors.
This is a variation of the classic Tarbell Color Changing Silks, with two silks changing together. Large silks, visible on a big stage for a large audience.
Colors indicated are for example only – the actual colors of the silks may vary in different sets