Pattern Has No End Help

Question

I am trying to create a pattern swatch for this shape, but it doesn't seem to be possible to find the edge of this pattern.
Take a look at the image I inserted, the colored boxes are the shape that will be repeated.
The next picture is an example of how the shape is repeated (in a clipping mask):
Here is an example ai file from my dropbox:
https://dl.dropboxusercontent.com/u/66310692/NoEndPattern.ai
I want to be able to apply this pattern to many different shapes very quickly, so a pattern swatch would be super helpful.
Either way, I would really like to know the answer to this puzzle.

Answer 1

Well, I double checked my pattern and found a couple small discrepencies that prevent it from being perfect when viewed up close. If a pattern like this has to be dublicated that many times to make it swatchable, it's not worth it. Here is a study I did on a 30 degree corner cut to a square and how it patterns:
I took a square, and cut 30 degree angles out of 2 corners, and patterned it. I rotated it so the angle cuts are vertical for the pattern. As you can see it get close to finishing every 4 lines, but when you select the red squares, you can see the gap in your selection box where it doesn't touch one side or the other of the square. So I took the red squares and repeated them, that is the dotted line below. Each square gets lower, so I copied the line up one, that is the blue dotted line, and found where it finally catches up to complete the pattern. It takes another 188 lines before you can complete this pattern. This pattern is very very easy to manualy create, but very very difficult to set up as a swatch pattern. I think the problem is the swatch patterns have to be linear patterns, and this pattern would be much easier to make if it could be programmed as a radial pattern.