MyLoopStarter:
    type: world
    events:
        on server start:
        - run MyLoopScript

MyLoopScript:
    type: task
    script:
    - foreach <server.list_online_players> {
      - if <def[value].equipment.boots.scriptname||null> == MyCustomBoots {
        - cast speed duration:10s power:1 <def[value]>
        }
      }
    - run MyLoopScript delay:9s