startup

reactor = peripheral.wrap("back")
mon = peripheral.wrap("bottom")
term.redirect(mon)
function parse(cmd)
  if cmd == "activate" then
    reactor.setActive(true)
  elseif cmd == "deactivate" then
    reactor.setActive(false)
  elseif cmd == "exit" then
    exit = true
  end
end

function main()
  term.setCursorPos(1,1)
  if reactor.getActive() then
    term.setBackgroundColor(colors.green)
    term.setTextColor(colors.blue)
    term.clear()
    mon.setTextScale(1)
    term.write("Active")
  else
    term.setBackgroundColor(colors.red)
    term.setTextColor(colors.blue)
    term.clear()
    mon.setTextScale(2)
    term.write("   INACTIVE")
  end
  term.setCursorPos(1,2)
  --mon.setTextScale(1)
  term.write("Command:")
  cmd = io.read()
  parse(cmd)
end

function timer()
  local myTimer = os.startTimer(10)
  while true do
    local event,timerID = os.pullEvent("timer")
    if timerID == myTimer then break end
  end
end

repeat
  parallel.waitForAny(main,timer)
until exit

term.restore()