I made one and didn't buy a pattern...I used this tutorial...
http://home-and-garden.webshots.com/...81579859euwgqH
It was very easy!! Most important thing is stacking your 4 layers perfect. PINS....use lots of flat head pins!
Here is a link to a pic of mine...
http://www.quiltingboard.com/t-140082-1.htm
One little warning....these are VERY addicting!! Now when I go into a fabric shop I find myself looking at all the fabric to see if it will work for another one....LOL
Lots of luck and have fun!