If you want a really easy way to do this, go to Eleanor Burns website and watch her video:
http://quiltinaday.com/theater/egg/egg1.html
It's the video called: Old Maid's Puzzle and Double Axehead. Axehead is another name for Apple Core.
Video number is 2705. She shows how to make two blocks in this video and the first one is the Old Maid's Puzzler or Drunkards path.