every 2 seconds:
 loop all entities:
  loop-entity is skeletons  set {_hea::*} to health of loop-entity
  wait 1 second
  loop {_hea::*}:
   if {_hea::*} > health of loop-entity:
    loop all entities around loop-entity in radius 5:
     set loop-entity-1's target to loop-entity