Mitred squares

I've just published my first pattern on Ravelry, it's a mitred phone cosy, and it's free!  While we were at BOB there was a lady sitting knitting mitred squares to make a waistcoat, and she'd made fingerless gloves, and we were all intrigued and getting a masterclass on how to do it.  I came home inspired slightly obsessed and have been playing around with the technique ever since. 

First there was this:

 then this (it's a work in progress, obviously):

then these:

 and finally the phone cosy was born:

and another one too, just to check the technique you understand.

So I thought I'd write up the pattern and offer it on Ravelry, for anyone else who might be similarly obsessed looking for something exciting and modular to knit.  You can download it here.  Enjoy!