What I like to do the most is mix all the Rokenbok rocks up then get the sweeper and pick then up. I go up the elevator and dump all the Rokenbok rocks into the water tower. The water tower sorts the red rocks and the blue rocks. Then the monorail comes and takes the red rocks or blue rocks. It dumps the red rocks or blue rocks into the place were the red rocks go or were the blue rocks go. Hope you liked my rokenbok setup, you can copy it if you want. My age is 11.