startup

receivingID = 2
messageOpen = "///OPENING\\\\\\ "
messageClose = "///CLOSING\\\\\\ "
monitor = peripheral.find("monitor")
rednet.open("front")
state = false
if fs.exists("saveState") then
  h = fs.open("saveState","r")
  value = h.readLine()
  if value == "true" then
    state = true
  elseif value == "false" then
    state= false
  else
    state = false
  end
  h.close()
end
function updateState()
while true do
  id, message = rednet.receive()
  if id == receivingID then
    if message == "open" then
      state = true
      redstone.setAnalogOutput("top",15)
      sleep(5)
      redstone.setAnalogOutput("top",0)
    elseif message == "close" then
      redstone.setAnalogOutput("top",15)
      sleep(5)
      redstone.setAnalogOutput("top",0)
      state = false
    end

    h = fs.open("saveState","w")
    if state then
      h.writeLine("true")
    else
      h.writeLine("false")
    end
    h.close()
  end
end
end
function useState()
  while true do
  monitor.clear()
  monitor.setCursorPos(1,1)
  monitor.setBackgroundColor(colors.blue)
  monitor.setTextScale(3)
  if state then
    redstone.setAnalogOutput("right",15)
    redstone.setAnalogOutput("left",0)
    monitor.write(messageOpen)
  else
    redstone.setAnalogOutput("right",0)
    redstone.setAnalogOutput("left",15)
    monitor.write(messageClose)
  end
  sleep(0.1)
end
end
parallel.waitForAll(updateState,useState)