rs.setOutput("bottom",false)
function on()
  rs.setOutput("bottom",true)
  rednet.open("right")
  rednet.broadcast("blaze_farm_no_xp: on;")
  rednet.close("right")
end
function off()
  rs.setOutput("bottom",false)
  rednet.open("right")
  rednet.broadcast("blaze_farm_no_xp: off;")
  rednet.close("right")
end
function count()
  n=0
  for i=1,16 do
    n=n+turtle.getItemCount(i)
  end
  return n
end
while true do
  os.sleep(1)
  nb=count()
  if nb<256 then
    on()
  elseif nb>960 then
    off()
  end
end