Reactor PDA

--This is in fact my code. Liscenced under Mozilla 2
shell.run("clear")
rednet.open("back")
gid = nil

function cid()
  output = false
  while true do
    print("test")
    id,msg = rednet.receive()
    if id == gid then
      output = msg
    end
  end
  return output
end

function main()
  while true do
    energy = cid()
    fuel = cid()
    state = cid()
    shell.run("clear")
    print("Reactor...")
    if energy < 5000000 and energy > 2500000 then
      term.setTextColor(colors.yellow)
    elseif energy < 2500000 then
      term.setTextColor(colors.red)
    elseif energy > 5000000 then
      term.setTextColor(colors.green)
    end
    print("Energy: "..energy)
    if fuel < 40000 and fuel > 25000 then
      term.setTextColor(colors.yelow)
    elseif fuel < 25000 then
      term.setTextColor(colors.red)
    elseif fuel > 40000 then
      term.setTextColor(colors.green)
    end
    print("Fuel: "..fuel)
    if state == true then
      term.setTextColor(colors.green)
      print("On/Off: ON")
    elseif state == false then
      term.setTextColor(colors.red)
      print("On/Off: OFF")
    end
    term.setTextColor(colors.white)
  end
end

while true do
  id,msg = nil
  id,msg = rednet.receive(2)
  if msg == "pair" then
    rednet.send(id,io.read())
    id,msg = rednet.receive(id)
    if msg == "paired" then
      gid = id
      print("paired")
      main()
    end
  end
end
print("paired")