addhook("second","decay")
function decay()
	for id=1,32 do
		if player(id,"exists") then
			parse("sethealth "..id.." "..player(id,"health")-1)
		end
	end
end

cnt=0
max_cnt=2 --  you can change here for more second 

addhook("second","_sec")
function _sec()
cnt=cnt+1
 if cnt==max_cnt then
 cnt=0
  for k,v in pairs(player(0,"tableliving")) do
  parse("sethealth "..v.." "..player(v,"health")-1)
  end
 end
end