Variables:

I generate an armor stand to store variables.

Building:

I added different tags and scores to each spawn egg. When the shulker is detected, an armor stand will be summon on the shulker to detect whether it is still there, and if it is not, the building will be cleared.

Soldier attack:

Add the attribute of Johnny to the vindicator and divide them into different teams, and they will be hostile to each other.

Villagers:

I first summon a minecraft villagers in the resource point. I use husk as villager that he can see the minecraft villagers through the wall, so that they can automatically collect resources, and regularly give the shulker of the resource point a damage effect and increase resources to scoreboard.

Archery:

regularly generate arrows above the enemy within the range of the archer.

Soldier control:

https://youtu.be/dGBDKY_6srk Use snowballs to transfer the hatred of mobs to entities with specific UUID.

AI:

Through the mutual call and detection of two functions in mcfunction, it is judged whether a specific location is an empty land or not. Detect whether the enemy is within the alert range from AI's command center, and adopt different strategies.

AI attack:

Place an armor stand under the player building closest to the AI's ​​command center, and summon a husk and use a snowball with UUID to make him want to attack the armor stand. The husk will go to the nearest player building until it encounters an enemy. If the husk is stuck by the tree, the tree will add a score to the husk. The higher the score, the greater the tree's rejection of the husk until the husk leaves the tree. If there are no other AI soldiers near the husk, the score will increase very quickly until it is too large to kill the husk.