Make your one army

Whit spawn eggs spawn Stevens that you need to give orders. First give him a weapon/seed and it will come like trading whit a villager, you push one item you geve him and write what to do like easy way like this: (push sword button) Attack enamy mobs in 30 blocks. And it will do it. But whit crossbows ,bow and arrow, you walk the place he needs to stand select it and type what he needs to do like : shoot enemy mobs in 50 blocks. And white seeds just the same like crossbows and bows you only need to select more than 1 block he needs to work on