startup

pim = peripheral.wrap("front")
glow = peripheral.wrap("glowstone_illuminator_17")

while true do

  while pim.getInvName() == "EmptyInventory" do
  sleep(1)
  end

  rs.setBundledOutput("bottom", colours.white)

  sleep(0.5)

  for i = 36, 39 do

    if pim.getStackInSlot(i) then
      pim.pushIntoSlot("down", i, 1, i)
      glow.setColor(0xFF0000)
    else
      pim.pullIntoSlot("down", i, 1, i)
      glow.setColor(0x00FF00)
    end

  end

  rs.setBundledOutput("bottom", 0)

  sleep(2)



end