on spawn of skeleton, pig, zombie, cow, chicken, horse, iron golem, sheep, skeleton, spider or creeper:
 set {_g} to 0
 loop all entities in radius 20 around the spawned entity:
  if chunk of spawned entity is chunk of loop-entity:
   add 1 to {_g}
  send message "%{_g}%" to console
 if {_g} is larger than 5:
   cancel the event