BlueBuildercreate: 
  type: assignment 
  actions: 
    on assignment: 
    - flag npc "select:0"
    - note cu@<m:<npc.location.x>-15>,0,<m:<npc.location.z>-15>,<npc.location.world.name>|<m:<npc.location.x>+15>,10,<m:<npc.location.z>+15>,<npc.location.world.name> as:<npc.location.world.name><npc.id>
    - walk <cu@<npc.location.world.name><npc.id>.get_blocks[GRAVEL].random[1]>