If you want to use the Behmor 2000 coffee roaster, there are a few things you need to keep in mind. First, you need to have green coffee beans. These can be purchased from many different places, including online retailers. Once you have your beans, you need to set the machine up according to the instructions in the manual. Once everything is set up, you will place the beans in the roasting chamber and select the desired roast profile. The machine will do the rest, roasting the beans to perfection. Once they are done, you can remove them and enjoy your fresh, roasted coffee!