def main():
    theCompressor = Compresser()  # create a Compressor object
    theHopper = Hopper()  # create a Hopper object
    theHopper.fill_coal()  # fill out the Hopper object with coal

    # loop through and have the Compressor object take coal out of the Hopper
    # and compress it.
    for i in range(10):
        print(theHopper)
        theCompressor.get_coal(theHopper)
        theCompressor.compress()
    print(theCompressor)