Exercise 6 No Helper

RunHandled(WaitForever,

OnEvery(CustomEvent("EntitySpawned")),
function(payload)
  --payload : CEntitySpawnedScriptEvent
  if not IsDeleted(payload) then
    local entity = payload:GetSpawnedEntity()
    if (entity:GetClassName() == "CPlayerPuppetEntity") then
      while not IsDeleted(entity) do
        entity:SetHealth(entity:GetHealth() + 1)
        Wait(CustomEvent("OnStep"))
      end
    end
  end
end)

Note that here I have to check if the entity is not deleted *right* as it spawns, as it sometimes happens that by the time the event is caught, the entity is already deleted.
I also have to check if it is the entity of the desired type to handle only those entities which I want to (in this case, player puppets).