Pre-plan your design and mark lightly with a pen or just design as you go.
Use a wooden skewer to make a hole in the orange.
Insert a whole clove.
Complete the design and set out to decorate.
Notes
The oranges should last for about a week, but depending on your weather, they may last longer or start to degrade sooner. Check on them daily and set them on a plate to ensure they don't damage any furniture.