How to Make Antimatter at CERN

We've done some really pretty awesome virtuoso experiments measuring the gravity of like little things things about the size of a centimeter and involves isolating them from everything else. We can measure the mass of tiny regular matter things but I guess it's hard to do it with antimatter right because that's really the question we're asking today is like if you have something made out of or a whole bunch of antimatter in one spot would it feel anti-gravity? It's also hard to put together a lot of antimatter at CERN so instead of making really big objects out of antimatter we try to do really precision experiments with much smaller amounts of antimatter. You want to make