startup

rednet.open("left")

local id = 1816

rs.setOutput("bottom",false)
while true do
  i,mess,dist = rednet.receive()
  if i == id then
    print(mess)
    if mess == "craft" then
      rs.setOutput("back",true)
    elseif mess == "blood" then
      rs.setOutput("back",false)
    end
  end
end