IceRunner Hub

every ticks:
    loop all entities:
       if loop-entity is a snowball:
            loop all blocks in radius 1 around loop-entity:
                wait 0.5 tick
               if loop-block is air:
                    set loop-block to ice
                    add location of loop-block to {_blocks::*}
    wait 4 seconds
    loop {_blocks::*}:
        set block at loop-value to air