This its a costum datapack you can use however your imagination wants to i perssonaly use it for hello neighbord project you can use it for a guard(but carfuel he can go thorught walls) How to use: when you join you want to make him a patrol zone to do that you will have to **spawn 10 patrol point**s so he can start over and over again, to do that use :
/summon marker ~ ~ ~ {Tags:["p1"]}
and
:/summon marker ~ ~ ~ {Tags:["p2"]}
and so on to 10 after you finished just type:/function hello_neighbor:spawn to spawn him and then go away so he can start his patrol to kill him type :
/kill @e[tag=vecin]
to clear **all the patrol points**type:
/kill @e[type=marker]
and to delte a speific one type:
/kill @e[type=marker,tag=p3,limit=1]
or in your case tag=p1/p2/p3,px to delete a speific point from 1 to 10
