Oh, thinking about it, I think I see. You know how you start a harlequin wrap by folding and joining two tapes, each oriented to wrap around the bar in a different direction, as shown in fig 4-6 here

http://www.wastedlife.org/bike/harlequin/index.html

I'm guessing you place the maroon and grey tapes side by side and join them to two black tapes placed side by side. And I think you could do a four color wrap the same way, if one of the black tapes was a fourth color. Right?