xpparty:
    item:
      type: EXP_BOTTLE
      name: "&a&lEXP PARTY"
    consumed: true
    actions:
      - { action: REPEAT, period: 1, delay: 0, from: 0, to: 99, actions: [
          { action: ITER, what: ONLINE_PLAYERS, actions: [
            { action: CALC, a: "{iter_locY}", b: "4", op: ADD, target: "y", actions: [
              { action: COMMAND, by: CONSOLE, command: "minecraft:summon minecraft:xp_bottle {iter_locX} {y} {iter_locZ}" }]}]}]}
      - { action: MESSAGE, to: EVERYBODY, message: "&a&l{player} has started an XP party!" }