Take an orange.
Cut the leaf top like a lid.
Should get something like this.
Cut around the surface of the skin. Make sure you don't cut too deep.
Using too much force will cut the orange too and you don't want that because it will make the peeling a lot messier.
Repeat the previous step. You should see that the top is devided in 4 equal parts.
You should get something like this. ^^ Done~