Candied Blood Orange Slices

Cut orange into 1/8-inch slices. In a small saucepan over medium heat, combine sugar, water, and syrup. Bring to a boil, cover, and simmer until clear and no crystals cling to sides of pan, about 3 minutes. Add orange slices in 1 layer; simmer until transparent, about 1 hour. Using a slotted spoon, transfer to a wire rack to cool.