health

players={}
os.loadAPI('ip')
ip.open()
ip.getIP()
p=peripheral.wrap('bottom')

function health()
  while true do
    for name,player in pairs(players) do
      if player.time>0 then
--        player.pl.heal(20)
        player.time=player.time-1
      else
        player.pl.sendChat(name..', time out!')
        players[name]=nil
      end
    end
    sleep(1)
  end
end

function check()
  while true do
    local event,name=os.pullEvent("player_logout")
    players[name]=nil
  end
end

t=30
function craftnet()
  while true do
    name=ip.receive()
    pl=p.getPlayerByName(name)
    if pl then
      pl.sendChat(name..', you are deathless for '..t..' seconds!')
      players[name]={pl=pl,time=t}
      file=io.open('health.log','a')
      file:write(name..'\n')
      file:close()
    end
  end
end

parallel.waitForAll(health,check,craftnet)