They seem to be all the rage right now. Some really awesome creation that you can get in your world by just pasting one command. I find the concept interesting, but I could not really find an explanation on it. I am no master command blocker, but I know it has something to do with falling sand. My question is how does it work, how would I make one? I would think I could use something like mcstacker to make it. Also, which commands get activated first, the ones at the top or bottom? thanks in advance!