kocka:
    type: assignment
    actions:
        on assignment:
        - trigger name:click_state:true
    interact scripts:
    - 10 disappear

disappear:
    type: interact
    steps:
        1:
            click trigger:
                script:
                - ^flag player nope
                - ^adjust <player> hide_entity:<npc>

disit:
    type: world
    debug: false
    events:
      on player join:
      - ^if <player.has_flag[nope]> {
        - ^adjust <player> hide_entity:<npc>            
      }