The idea being that there are several triangle-meshes right next to each other in a row, without any overlap, and their direction is based on what part of the box they're on (x axis, face towards y, if on the y axis, face towards x), like the rim in the picture.
I tried doing this with the Hair Particle system (after making a mesh for the rim), and the result is like this:
First of all, the triangles are ot facing the appropraite direction, they're all facing the same way, only the ones on the x axis are faced the proper way, but the ones on the y axis should be turned 90 degrees. Also, I they're randomly spaced, I need them to be back to back with no space in between. Any ideas?