Grilled Chicken Kabobs with Simple Lemon-Orange Marinade

plus 2 tablespoons olive oil

juice of 1 orange

juice of 1 lemon

garlic cloves, minced

finely chopped fresh parsley

salt

freshly ground black pepper

boneless, skinless chicken breast, cut into 1 ½-inch pieces

red bell pepper, chopped into 1 ½-inch pieces

green bell pepper, chopped into 1 ½-inch pieces

yellow bell pepper, chopped into 1 ½-inch pieces

red onion, chopped into 1 ½-inch pieces