How Does Grain get from Bins Into Trucks?

I shot a quick video today while I was loading corn to deliver to the ethanol plant.  Nothing fancy, but you can see the auger inside the bin dumping corn into the bottom of the leg.  The leg has a looooooooong belt inside of it with dozens of buckets that scoop the corn from the bottom and carry it all the way to the top.  When the buckets turn over they dump the corn into another tube with carries it down to the truck.  We can select different tubes from ground level to send grain to the other bins as well.