This is a great beginner pattern as the cuts are easy and there are only 4 pieces total.  Plus its a fun introduction to learning how to incorporate wire, beads and jewelry findings into your stained glass pieces.  This definately will take your creations to the next level!
 I used a mirror for the center piece just remember the backing of the mirror is susceptible to scratches and smearing.  Mine held up all summer with only minor smearing so it does work and its worth it to see the critters watch themselves in the mirrror.  
Follow along with me on Youtube and watch as I Add Jewelry Findings To My Stained Glass Fairy Door by clicking here.  (Watch the video to the end to see the squirrels reaction to his own reflection in the fairy door mirror, its hilarious)!