fallingblocks:
  type: task
  debug: true
  script:
    - foreach <cu@<player.flag[cuboid_pos_1]>|<player.flag[cuboid_pos_2]>.get_blocks> {
      - if li@m@air|m@stationary_water|m@water !contains <%value%.material> {
        - run fallingblocks1 def:%value%
        }
      }
fallingblocks1:
  type: task
  debug: true
  script:
  - ^spawn falling_block,<%1%.material.name> %1% save:1
  - ^modifyblock %1% air