In a bowl, combine the fruit cocktail, oranges, coconut, 1 cup whipped topping and 1/2 cup marshmallows. Spoon into two balls, one 5-1/2 in. and one 3-1/2 in., on a serving plate, with smaller ball in front of larger ball. Spoon out some salad from small ball to make a doorway. Cover with remaining whipped topping and marshmallows.