There is a source and the source has to produce 2 types of items. It by default shows red and green color items and then one operator picks items from source to the storage then there are 2 more operators, and 2 machines and in that 1 operator would take the red items from the storage and send to machine 1 and the 2nd operator would green items and take and send to the machine 2, so tell me how to make the 1st operator only take red items and 2nd operator to take only green operator in Flexsim.