I'm trying to simulate a double shuttle car in a palletizing area. This shuttle works for 7 palletizing lines. The shuttle must pick up 2 pallets at a time from the same line. Pallets from lines 1, 2 and 3 must be delivered to conveyor A and pallets from lines 4, 5, 6 and 7 must be delivered to conveyor B. How can I simulate it?