My parents had an old pomegranate that was past its prime. Rather than let it go completely to waste, I decided to decorate it with cloves, just as you would an orange. The skin was a on the thick side, so I used a wooden skewer to poke the holes first. I've learned from doing the oranges that it's best to keep the cloves a little farther apart than your desired look. Then when the fruit continues to dry up, the cloves aren't so close together that the skin breaks apart.
The longer the fruit dries, the more the cloves will bleed a dark brown stain into the skin of the orange or pomegranate. If you decide to cover the fruit completely in cloves, it will turn all brown but if you want to have a decorative brown line, then do separate lines of cloves with greater spaces between them.