ma_warps: 
  type: world 
  events: 
    on creeper spawns: 
      - wait 2t 
      - if <context.location.block.material> contains "_water" && <context.entity.eid.is_inside_vehicle> == "false" { 
        - mount creeper|boat <context.location> 
        - remove <context.entity> 
      }