With these ideas it is possible to go ahead and make flexagons. But there are so many of them that the idea soon gets boring, in spite of all the time and effort which went into deducing the description in the first place. Given that one of the uses of flexagons is in magic shows (that is how Martin Gardner became involved with them) it is worthwhile looking for some simple yet striking combinations. One of them has a Tuckerman Tree which is a spiral; with four nodes it has the form
The middle diagram of (square) cycles would be
The detail which makes this class of flexagons, which are called spirals, interesting is that the point 1 is a part of every square, and so it is possible to return to it over and over as the flexagon is run through its paces. In fact, the construction is so nice that extremely long spirals can be constructed. By flexing, then turning over, the square packets fanfold and avoid the bulkiness of scrolling. The turning over is because of the arrows, which can only be respected by turning over.
The list of turns and faces would then be