I have instructions for a children's pullover somewhere. They start out with triangles, of course, then they knit the sqaures by decreasing for the square on edge and then keep that last stitch on the needle, cast on again by making stitches out of the side of the square and knit on.
The pullover had kind of a patched and gypsy style look, I was not sooo keen on. but if you use the right colors and work neatly it can be very nice.
If you need more instruction I can look up the technique from the magazine somewhere. let me know.