Joe30s:
  type: world
  events:
    on test command:
    - announce "meow"
    - create spider Joe <player.location> save:myNPC
    - execute as_server 'npc sel <entry[MyNPC].created_npc.id>'
    - execute as_server 'trait sentry'
    - execute as_server 'sentry target add entity:owner'  
    - wait 30s
    - remove <entry[myNPC].created_npc.id>